31973812 has 12 divisors (see below), whose sum is σ = 60258436. Its totient is φ = 14757120.

The previous prime is 31973783. The next prime is 31973839. The reversal of 31973812 is 21837913.

It can be written as a sum of positive squares in 2 ways, for example, as 21566736 + 10407076 = 4644^2 + 3226^2 .

It is a super-2 number, since 2×31973812² = 2044649307622688, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) 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, 307389 + ... + 307492.

Almost surely, 2^31973812 is an apocalyptic number.

It is an amenable number.

31973812 is a deficient number, since it is larger than the sum of its proper divisors (28284624).

31973812 is a wasteful number, since it uses less digits than its factorization.

31973812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 614898 (or 614896 counting only the distinct ones).

The product of its digits is 9072, while the sum is 34.

The square root of 31973812 is about 5654.5390616743. The cubic root of 31973812 is about 317.3935808018.

The spelling of 31973812 in words is "thirty-one million, nine hundred seventy-three thousand, eight hundred twelve".