31080661925 has 12 divisors (see below), whose sum is σ = 39480022596. Its totient is φ = 24258076800.

The previous prime is 31080661903. The next prime is 31080661939. The reversal of 31080661925 is 52916608013.

It can be written as a sum of positive squares in 6 ways, for example, as 65577604 + 31015084321 = 8098^2 + 176111^2 .

It is not a de Polignac number, because 31080661925 - 2⁸ = 31080661669 is a prime.

It is a super-2 number, since 2×31080661925² (a number of 22 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

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, 15160274 + ... + 15162323.

It is an arithmetic number, because the mean of its divisors is an integer number (3290001883).

Almost surely, 2^31080661925 is an apocalyptic number.

It is an amenable number.

31080661925 is a deficient number, since it is larger than the sum of its proper divisors (8399360671).

31080661925 is a wasteful number, since it uses less digits than its factorization.

31080661925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30322648 (or 30322643 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 31080661925 in words is "thirty-one billion, eighty million, six hundred sixty-one thousand, nine hundred twenty-five".