31591630272 has 28 divisors (see below), whose sum is σ = 83586188936. Its totient is φ = 10530543360.

The previous prime is 31591630261. The next prime is 31591630321. The reversal of 31591630272 is 27203619513.

It is a happy number.

It is a super-2 number, since 2×31591630272² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31591630272.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82269679 + ... + 82270062.

Almost surely, 2^31591630272 is an apocalyptic number.

31591630272 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31591630272 is an abundant number, since it is smaller than the sum of its proper divisors (51994558664).

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

31591630272 is a wasteful number, since it uses less digits than its factorization.

31591630272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164539756 (or 164539746 counting only the distinct ones).

The product of its (nonzero) digits is 68040, while the sum is 39.

The spelling of 31591630272 in words is "thirty-one billion, five hundred ninety-one million, six hundred thirty thousand, two hundred seventy-two".