31957275912 has 32 divisors (see below), whose sum is σ = 80123450400. Its totient is φ = 10621723904.

The previous prime is 31957275887. The next prime is 31957275913. The reversal of 31957275912 is 21957275913.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (31957275913) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1910337 + ... + 1926992.

It is an arithmetic number, because the mean of its divisors is an integer number (2503857825).

Almost surely, 2^31957275912 is an apocalyptic number.

It is an amenable number.

31957275912 is an abundant number, since it is smaller than the sum of its proper divisors (48166174488).

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

31957275912 is a wasteful number, since it uses less digits than its factorization.

31957275912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3837685 (or 3837681 counting only the distinct ones).

The product of its digits is 1190700, while the sum is 51.

Subtracting from 31957275912 its reverse (21957275913), we obtain a palindrome (9999999999).

The spelling of 31957275912 in words is "thirty-one billion, nine hundred fifty-seven million, two hundred seventy-five thousand, nine hundred twelve".