31601233221564 has 24 divisors (see below), whose sum is σ = 73737717319168. Its totient is φ = 10533529197360.

The previous prime is 31601233221517. The next prime is 31601233221617. The reversal of 31601233221564 is 46512233210613.

It is a super-2 number, since 2×31601233221564² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26288842 + ... + 27464625.

Almost surely, 2^{31601233221564} is an apocalyptic number.

It is an amenable number.

31601233221564 is an abundant number, since it is smaller than the sum of its proper divisors (42136484097604).

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

31601233221564 is a wasteful number, since it uses less digits than its factorization.

31601233221564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53802465 (or 53802463 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 31601233221564 in words is "thirty-one trillion, six hundred one billion, two hundred thirty-three million, two hundred twenty-one thousand, five hundred sixty-four".