31994164 has 12 divisors (see below), whose sum is σ = 56093184. Its totient is φ = 15967544.

The previous prime is 31994147. The next prime is 31994191. The reversal of 31994164 is 46149913.

It is a congruent number.

It is an unprimeable number.

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, 4852 + ... + 9355.

It is an arithmetic number, because the mean of its divisors is an integer number (4674432).

Almost surely, 2^31994164 is an apocalyptic number.

It is an amenable number.

31994164 is a deficient number, since it is larger than the sum of its proper divisors (24099020).

31994164 is a wasteful number, since it uses less digits than its factorization.

31994164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14774 (or 14772 counting only the distinct ones).

The product of its digits is 23328, while the sum is 37.

The square root of 31994164 is about 5656.3383915745. The cubic root of 31994164 is about 317.4609090691.

The spelling of 31994164 in words is "thirty-one million, nine hundred ninety-four thousand, one hundred sixty-four".