31164872 has 16 divisors (see below), whose sum is σ = 58786560. Its totient is φ = 15488464.

The previous prime is 31164871. The next prime is 31164877. The reversal of 31164872 is 27846113.

It is not an unprimeable number, because it can be changed into a prime (31164871) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10328 + ... + 12999.

It is an arithmetic number, because the mean of its divisors is an integer number (3674160).

Almost surely, 2^31164872 is an apocalyptic number.

It is an amenable number.

31164872 is a deficient number, since it is larger than the sum of its proper divisors (27621688).

31164872 is a wasteful number, since it uses less digits than its factorization.

31164872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23500 (or 23496 counting only the distinct ones).

The product of its digits is 8064, while the sum is 32.

The square root of 31164872 is about 5582.5506715121. The cubic root of 31164872 is about 314.6939902141.

The spelling of 31164872 in words is "thirty-one million, one hundred sixty-four thousand, eight hundred seventy-two".