31725057 has 32 divisors (see below), whose sum is σ = 52756480. Its totient is φ = 16511040.

The previous prime is 31725019. The next prime is 31725061. The reversal of 31725057 is 75052713.

It is not a de Polignac number, because 31725057 - 2⁷ = 31724929 is a prime.

It is the 5633-rd Hogben number.

It is not an unprimeable number, because it can be changed into a prime (31725097) by changing a digit.

It is a nontrivial repunit in base 5632.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20832 + ... + 22302.

It is an arithmetic number, because the mean of its divisors is an integer number (1648640).

Almost surely, 2^31725057 is an apocalyptic number.

It is an amenable number.

31725057 is a deficient number, since it is larger than the sum of its proper divisors (21031423).

31725057 is a wasteful number, since it uses less digits than its factorization.

31725057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573.

The product of its (nonzero) digits is 7350, while the sum is 30.

The square root of 31725057 is about 5632.5000665779. The cubic root of 31725057 is about 316.5683337650.

The spelling of 31725057 in words is "thirty-one million, seven hundred twenty-five thousand, fifty-seven".