31251125332 has 18 divisors (see below), whose sum is σ = 63618362682. Its totient is φ = 13393339344.

The previous prime is 31251125299. The next prime is 31251125341. The reversal of 31251125332 is 23352115213.

It can be written as a sum of positive squares in only one way, i.e., 28370012356 + 2881112976 = 168434^2 + 53676^2 .

It is a super-2 number, since 2×31251125332² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 31251125332.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79722063 + ... + 79722454.

Almost surely, 2^31251125332 is an apocalyptic number.

It is an amenable number.

31251125332 is an abundant number, since it is smaller than the sum of its proper divisors (32367237350).

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

31251125332 is a wasteful number, since it uses less digits than its factorization.

31251125332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159444535 (or 159444526 counting only the distinct ones).

The product of its digits is 5400, while the sum is 28.

The spelling of 31251125332 in words is "thirty-one billion, two hundred fifty-one million, one hundred twenty-five thousand, three hundred thirty-two".