31339916 has 12 divisors (see below), whose sum is σ = 55264440. Its totient is φ = 15550080.

The previous prime is 31339883. The next prime is 31339921. The reversal of 31339916 is 61993313.

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, 29381 + ... + 30428.

It is an arithmetic number, because the mean of its divisors is an integer number (4605370).

Almost surely, 2^31339916 is an apocalyptic number.

It is an amenable number.

31339916 is a deficient number, since it is larger than the sum of its proper divisors (23924524).

31339916 is a wasteful number, since it uses less digits than its factorization.

31339916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59944 (or 59942 counting only the distinct ones).

The product of its digits is 13122, while the sum is 35.

The square root of 31339916 is about 5598.2064985136. The cubic root of 31339916 is about 315.2820720215.

The spelling of 31339916 in words is "thirty-one million, three hundred thirty-nine thousand, nine hundred sixteen".