31287052 has 24 divisors (see below), whose sum is σ = 56594160. Its totient is φ = 15122880.

The previous prime is 31287041. The next prime is 31287071. The reversal of 31287052 is 25078213.

It is a self number, because there is not a number n which added to its sum of digits gives 31287052.

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, 25902 + ... + 27082.

It is an arithmetic number, because the mean of its divisors is an integer number (2358090).

Almost surely, 2^31287052 is an apocalyptic number.

It is an amenable number.

31287052 is a deficient number, since it is larger than the sum of its proper divisors (25307108).

31287052 is a wasteful number, since it uses less digits than its factorization.

31287052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1401 (or 1399 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 31287052 is about 5593.4829936275. The cubic root of 31287052 is about 315.1047002255.

The spelling of 31287052 in words is "thirty-one million, two hundred eighty-seven thousand, fifty-two".