8631021325 has 12 divisors (see below), whose sum is σ = 11071517940. Its totient is φ = 6666719360.

The previous prime is 8631021317. The next prime is 8631021349. The reversal of 8631021325 is 5231201368.

It can be written as a sum of positive squares in 6 ways, for example, as 140873161 + 8490148164 = 11869^2 + 92142^2 .

It is not a de Polignac number, because 8631021325 - 2³ = 8631021317 is a prime.

It is a super-2 number, since 2×8631021325² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5951704 + ... + 5953153.

It is an arithmetic number, because the mean of its divisors is an integer number (922626495).

Almost surely, 2^8631021325 is an apocalyptic number.

It is an amenable number.

8631021325 is a deficient number, since it is larger than the sum of its proper divisors (2440496615).

8631021325 is a wasteful number, since it uses less digits than its factorization.

8631021325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11904896 (or 11904891 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 8631021325 is about 92903.2901731688. The cubic root of 8631021325 is about 2051.2600878760.

The spelling of 8631021325 in words is "eight billion, six hundred thirty-one million, twenty-one thousand, three hundred twenty-five".