31005164 has 12 divisors (see below), whose sum is σ = 54456864. Its totient is φ = 15446064.

The previous prime is 31005157. The next prime is 31005187. The reversal of 31005164 is 46150013.

It is a super-2 number, since 2×31005164² = 1922640389333792, which contains 22 as substring.

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, 12884 + ... + 15099.

It is an arithmetic number, because the mean of its divisors is an integer number (4538072).

Almost surely, 2^31005164 is an apocalyptic number.

It is an amenable number.

31005164 is a deficient number, since it is larger than the sum of its proper divisors (23451700).

31005164 is a wasteful number, since it uses less digits than its factorization.

31005164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28264 (or 28262 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 31005164 is about 5568.2280844089. The cubic root of 31005164 is about 314.1555073779.

Adding to 31005164 its reverse (46150013), we get a palindrome (77155177).

The spelling of 31005164 in words is "thirty-one million, five thousand, one hundred sixty-four".