31057131172 has 12 divisors (see below), whose sum is σ = 54352792396. Its totient is φ = 15527761920.

The previous prime is 31057131167. The next prime is 31057131191. The reversal of 31057131172 is 27113175013.

It can be written as a sum of positive squares in 2 ways, for example, as 23111904676 + 7945226496 = 152026^2 + 89136^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109329 + ... + 272152.

Almost surely, 2^31057131172 is an apocalyptic number.

It is an amenable number.

31057131172 is a deficient number, since it is larger than the sum of its proper divisors (23295661224).

31057131172 is a wasteful number, since it uses less digits than its factorization.

31057131172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401838 (or 401836 counting only the distinct ones).

The product of its (nonzero) digits is 4410, while the sum is 31.

The spelling of 31057131172 in words is "thirty-one billion, fifty-seven million, one hundred thirty-one thousand, one hundred seventy-two".