31399652 has 24 divisors (see below), whose sum is σ = 57184512. Its totient is φ = 15069600.

The previous prime is 31399639. The next prime is 31399661. The reversal of 31399652 is 25699313.

It is a super-2 number, since 2×31399652² = 1971876291442208, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15278 + ... + 17210.

It is an arithmetic number, because the mean of its divisors is an integer number (2382688).

Almost surely, 2^31399652 is an apocalyptic number.

It is an amenable number.

31399652 is a deficient number, since it is larger than the sum of its proper divisors (25784860).

31399652 is a wasteful number, since it uses less digits than its factorization.

31399652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2099 (or 2097 counting only the distinct ones).

The product of its digits is 43740, while the sum is 38.

The square root of 31399652 is about 5603.5392387312. The cubic root of 31399652 is about 315.4822612031.

The spelling of 31399652 in words is "thirty-one million, three hundred ninety-nine thousand, six hundred fifty-two".