31393612 has 24 divisors (see below), whose sum is σ = 57747536. Its totient is φ = 14914368.

The previous prime is 31393561. The next prime is 31393619. The reversal of 31393612 is 21639313.

It is not an unprimeable number, because it can be changed into a prime (31393619) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3898 + ... + 8830.

Almost surely, 2^31393612 is an apocalyptic number.

It is an amenable number.

31393612 is a deficient number, since it is larger than the sum of its proper divisors (26353924).

31393612 is a wasteful number, since it uses less digits than its factorization.

31393612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5017 (or 5015 counting only the distinct ones).

The product of its digits is 2916, while the sum is 28.

The square root of 31393612 is about 5603.0002677137. Note that the first 3 decimals coincide. The cubic root of 31393612 is about 315.4620313075.

It can be divided in two parts, 3 and 1393612, that added together give a triangular number (1393615 = T₁₆₆₉).

The spelling of 31393612 in words is "thirty-one million, three hundred ninety-three thousand, six hundred twelve".