31966172 has 12 divisors (see below), whose sum is σ = 63932400. Its totient is φ = 13699776.

The previous prime is 31966163. The next prime is 31966199. The reversal of 31966172 is 27166913.

31966172 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 570797 + ... + 570852.

It is an arithmetic number, because the mean of its divisors is an integer number (5327700).

Almost surely, 2^31966172 is an apocalyptic number.

It is an amenable number.

31966172 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.

31966172 is a wasteful number, since it uses less digits than its factorization.

31966172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141660 (or 1141658 counting only the distinct ones).

The product of its digits is 13608, while the sum is 35.

The square root of 31966172 is about 5653.8634578490. The cubic root of 31966172 is about 317.3682988604.

The spelling of 31966172 in words is "thirty-one million, nine hundred sixty-six thousand, one hundred seventy-two".