The name Alexey in Hebrew letters is אלכסיי. Below: how its number adds up, which page of the Torah it falls on and what verse stands there. Everything is computed, nothing is guessed.
אלכסיי
In short
Your name in Hebrew letters is אלכסיי. Adding up the numbers of its letters gives 131 — the same as the Torah word מצא, “to come forth to, i.e. appear or exist”. That number points to Torah page 131 of 354 — in the portion Mishpatim. What that portion is about: Laws of the servant, damages, theft and pledges; “an eye for an eye” as compensation; the sabbatical year; “we will do and we will hear”. The verse that begins with the first letter of your name and ends with the last is Genesis 15:19. Each of these steps is laid out below with its sources. There are no predictions or judgments here — only the text of the Torah and arithmetic you can check.
Adding up the letters of the name אלכסיי gives 131.
131
The number 131 is the Torah word מצא — «to come forth to, i.e. appear or exist» (Genesis 2:20).
The number 131, as the remainder modulo 354, points to Torah page 131 in the book of Shmot (Exodus). These are its opening words:
האמרי והחתי והפרזי והכנעני החוי והיבוסי והכחדתיו לא …
The verse this place falls on is Shmot (Exodus) 23:23:
כִּי־יֵלֵךְ מַלְאָכִי לְפָנֶיךָ וֶהֱבִיאֲךָ אֶל־הָאֱמֹרִי וְהַחִתִּי וְהַפְּרִזִּי וְהַכְּנַעֲנִי הַחִוִּי וְהַיְבוּסִי וְהִכְחַדְתִּיו
For Mine angel shall go before thee, and bring thee in unto the Amorite, and the Hittite, and the Perizzite, and the Canaanite, the Hivite, and the Jebusite; and I will cut them off.
This is from the portion Mishpatim. What it is about: Laws of the servant, damages, theft and pledges; “an eye for an eye” as compensation; the sabbatical year; “we will do and we will hear”.
The same number, 131, is given by these biblical names:
גבעון · אלימלך · מלכיאל · אפים
Nine ways of counting
The tradition counts the same name in several ways. The main one is above: each letter is its number. The other eight are old and checkable too; each gives its own number, and many of them have a Torah word with the same number.
Final letters as 500–900 (mispar gadol) — 131. A Torah word with the same number is מצא — “to come forth to, i.e. appear or exist” (Genesis 2:20).
Reduced, each letter to one digit (mispar katan) — 14. A Torah word with the same number is יד — “a hand” (Genesis 3:22).
Ordinal: alef 1, bet 2 … tav 22 (mispar siduri) — 59.
Cumulative: a letter plus all letters before it (mispar kidmi) — 546. A Torah word with the same number is ארםנהרים — “Aram of” (Genesis 24:10).
Squares of the letter values (mispar perati) — 5101.
Building: the sum grows with each letter (mispar bone’eh) — 446.
The word that comes out is תכלחממ. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 538.
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 445. A Torah word with the same number is תולדה — “descent, i.e. family” (Genesis 2:4).
The number 131 appears in the classical books 27 times across 18 works. The earliest mention is ספר קרניים (~1400).
The name אלכסיי does not stand as a word in the Pentateuch — as with most names, including many Tanakh names from the later books.
The verse of your name
There is a custom: at the end of the prayer one says a Torah verse that begins with the first letter of one's name and ends with its last. For אלכסיי these are א and י. The Pentateuch has 17 such verses. The first of them is Genesis 15:19:
את הקיני ואת הקנזי ואת הקדמני
This is from the portion Lech Lecha. What it is about: “Go forth”: Abraham leaves Haran; the promise of land and offspring; the covenant between the pieces; circumcision.
Nine ways of counting
The tradition counts the same name in several ways. The main one is above: each letter is its number. The other eight are old and checkable too; each gives its own number, and many of them have a Torah word with the same number.
Final letters as 500–900 (mispar gadol) — 131. A Torah word with the same number is מצא — “to come forth to, i.e. appear or exist” (Genesis 2:20).
Reduced, each letter to one digit (mispar katan) — 14. A Torah word with the same number is יד — “a hand” (Genesis 3:22).
Ordinal: alef 1, bet 2 … tav 22 (mispar siduri) — 59.
Cumulative: a letter plus all letters before it (mispar kidmi) — 546. A Torah word with the same number is ארםנהרים — “Aram of” (Genesis 24:10).
Squares of the letter values (mispar perati) — 5101.
Building: the sum grows with each letter (mispar bone’eh) — 446.
The word that comes out is תכלחממ. Atbash: letters mirrored, alef for tav, bet for shin, and the number of the resulting word — 538.
Filling: the names of the letters are counted — alef, bet, gimel… (milui) — 445. A Torah word with the same number is תולדה — “descent, i.e. family” (Genesis 2:4).
Add a date of birth and the verse of meeting from that week's portion is added to the reading.
Each Hebrew letter has a number; a word's number is their sum (alef 1 … tav 400). The page is the remainder modulo 354: the Torah divided into 354 pages of 861 letters, as the lunar year has 354 days. Everything can be checked by hand.
Биньямин Пичхадзе, «Хумаш 354» (חומש 354), Бней-Брак, 2002 / התשס״ג · A calculation, not a prediction.