31257064172 has 12 divisors (see below), whose sum is σ = 54854821896. Its totient is φ = 15584257920.

The previous prime is 31257064159. The next prime is 31257064187. The reversal of 31257064172 is 27146075213.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

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, 11066954 + ... + 11069777.

It is an arithmetic number, because the mean of its divisors is an integer number (4571235158).

Almost surely, 2^31257064172 is an apocalyptic number.

It is an amenable number.

31257064172 is a deficient number, since it is larger than the sum of its proper divisors (23597757724).

31257064172 is a wasteful number, since it uses less digits than its factorization.

31257064172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22137088 (or 22137086 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 31257064172 in words is "thirty-one billion, two hundred fifty-seven million, sixty-four thousand, one hundred seventy-two".