31115520212 has 12 divisors (see below), whose sum is σ = 62231040480. Its totient is φ = 13335222936.

The previous prime is 31115520203. The next prime is 31115520277. The reversal of 31115520212 is 21202551113.

31115520212 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 555634262 + ... + 555634317.

It is an arithmetic number, because the mean of its divisors is an integer number (5185920040).

Almost surely, 2^31115520212 is an apocalyptic number.

It is an amenable number.

31115520212 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

31115520212 is a wasteful number, since it uses less digits than its factorization.

31115520212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111268590 (or 1111268588 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 23.

The spelling of 31115520212 in words is "thirty-one billion, one hundred fifteen million, five hundred twenty thousand, two hundred twelve".