3625252621 has 4 divisors (see below), whose sum is σ = 3625482492. Its totient is φ = 3625022752.

The previous prime is 3625252511. The next prime is 3625252627. The reversal of 3625252621 is 1262525263.

3625252621 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1262525263 = 2393 ⋅527591.

It can be written as a sum of positive squares in 2 ways, for example, as 1865030596 + 1760222025 = 43186^2 + 41955^2 .

It is a cyclic number.

It is not a de Polignac number, because 3625252621 - 2²⁵ = 3591698189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3625252627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 89386 + ... + 123451.

It is an arithmetic number, because the mean of its divisors is an integer number (906370623).

Almost surely, 2^3625252621 is an apocalyptic number.

It is an amenable number.

3625252621 is a deficient number, since it is larger than the sum of its proper divisors (229871).

3625252621 is a wasteful number, since it uses less digits than its factorization.

3625252621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229870.

The product of its digits is 43200, while the sum is 34.

The square root of 3625252621 is about 60210.0707606294. The cubic root of 3625252621 is about 1536.1940962324.

Adding to 3625252621 its reverse (1262525263), we get a palindrome (4887777884).

It can be divided in two parts, 362525262 and 1, that added together give a palindrome (362525263).

The spelling of 3625252621 in words is "three billion, six hundred twenty-five million, two hundred fifty-two thousand, six hundred twenty-one".