31312122486928 has 20 divisors (see below), whose sum is σ = 60675099063100. Its totient is φ = 15654032406144.

The previous prime is 31312122486923. The next prime is 31312122486929. The reversal of 31312122486928 is 82968422121313.

It can be written as a sum of positive squares in 2 ways, for example, as 5281024610304 + 26031097876624 = 2298048^2 + 5102068^2 .

It is not an unprimeable number, because it can be changed into a prime (31312122486923) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 126675003 + ... + 126921946.

It is an arithmetic number, because the mean of its divisors is an integer number (3033754953155).

Almost surely, 2^{31312122486928} is an apocalyptic number.

It is an amenable number.

31312122486928 is a deficient number, since it is larger than the sum of its proper divisors (29362976576172).

31312122486928 is a wasteful number, since it uses less digits than its factorization.

31312122486928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253604674 (or 253604668 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The spelling of 31312122486928 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty-two million, four hundred eighty-six thousand, nine hundred twenty-eight".