31013525616 has 80 divisors (see below), whose sum is σ = 80435566080. Its totient is φ = 10296993280.

The previous prime is 31013525597. The next prime is 31013525623. The reversal of 31013525616 is 61652531013.

It is a super-2 number, since 2×31013525616² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24059500 + ... + 24060788.

It is an arithmetic number, because the mean of its divisors is an integer number (1005444576).

Almost surely, 2^31013525616 is an apocalyptic number.

It is an amenable number.

31013525616 is an abundant number, since it is smaller than the sum of its proper divisors (49422040464).

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

31013525616 is a wasteful number, since it uses less digits than its factorization.

31013525616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2894 (or 2888 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The spelling of 31013525616 in words is "thirty-one billion, thirteen million, five hundred twenty-five thousand, six hundred sixteen".