31257934812 has 72 divisors (see below), whose sum is σ = 88790685984. Its totient is φ = 9199656576.

The previous prime is 31257934811. The next prime is 31257934837. The reversal of 31257934812 is 21843975213.

It is a happy number.

31257934812 is a `hidden beast` number, since 31 + 2 + 57 + 93 + 481 + 2 = 666.

It is a super-2 number, since 2×31257934812² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31257934811) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1441203 + ... + 1462730.

It is an arithmetic number, because the mean of its divisors is an integer number (1233203972).

Almost surely, 2^31257934812 is an apocalyptic number.

It is an amenable number.

31257934812 is an abundant number, since it is smaller than the sum of its proper divisors (57532751172).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31257934812 is a wasteful number, since it uses less digits than its factorization.

31257934812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2903979 (or 2903974 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 31257934812 in words is "thirty-one billion, two hundred fifty-seven million, nine hundred thirty-four thousand, eight hundred twelve".