31312924 has 12 divisors (see below), whose sum is σ = 56687400. Its totient is φ = 15116528.

The previous prime is 31312921. The next prime is 31312937. The reversal of 31312924 is 42921313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31312921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134854 + ... + 135085.

It is an arithmetic number, because the mean of its divisors is an integer number (4723950).

Almost surely, 2^31312924 is an apocalyptic number.

It is an amenable number.

31312924 is a deficient number, since it is larger than the sum of its proper divisors (25374476).

31312924 is a wasteful number, since it uses less digits than its factorization.

31312924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269972 (or 269970 counting only the distinct ones).

The product of its digits is 1296, while the sum is 25.

The square root of 31312924 is about 5595.7952071176. The cubic root of 31312924 is about 315.1915321275.

The spelling of 31312924 in words is "thirty-one million, three hundred twelve thousand, nine hundred twenty-four".