31086912 has 28 divisors (see below), whose sum is σ = 82251296. Its totient is φ = 10362240.

The previous prime is 31086911. The next prime is 31086917. The reversal of 31086912 is 21968013.

It is a self number, because there is not a number n which added to its sum of digits gives 31086912.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31086911) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80764 + ... + 81147.

Almost surely, 2^31086912 is an apocalyptic number.

31086912 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31086912 is an abundant number, since it is smaller than the sum of its proper divisors (51164384).

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

31086912 is a wasteful number, since it uses less digits than its factorization.

31086912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161926 (or 161916 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 31086912 is about 5575.5638279909. The cubic root of 31086912 is about 314.4313651542.

The spelling of 31086912 in words is "thirty-one million, eighty-six thousand, nine hundred twelve".