31982864520 has 32 divisors (see below), whose sum is σ = 95948593920. Its totient is φ = 8528763840.

The previous prime is 31982864503. The next prime is 31982864531. The reversal of 31982864520 is 2546828913.

It is a self number, because there is not a number n which added to its sum of digits gives 31982864520.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133261816 + ... + 133262055.

It is an arithmetic number, because the mean of its divisors is an integer number (2998393560).

Almost surely, 2^31982864520 is an apocalyptic number.

31982864520 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31982864520 is an abundant number, since it is smaller than the sum of its proper divisors (63965729400).

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

31982864520 is a wasteful number, since it uses less digits than its factorization.

31982864520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266523885 (or 266523881 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 48.

The spelling of 31982864520 in words is "thirty-one billion, nine hundred eighty-two million, eight hundred sixty-four thousand, five hundred twenty".