25231564 has 24 divisors (see below), whose sum is σ = 45602928. Its totient is φ = 12207360.

The previous prime is 25231561. The next prime is 25231571. The reversal of 25231564 is 46513252.

It is not an unprimeable number, because it can be changed into a prime (25231561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21907 + ... + 23029.

It is an arithmetic number, because the mean of its divisors is an integer number (1900122).

Almost surely, 2^25231564 is an apocalyptic number.

It is an amenable number.

25231564 is a deficient number, since it is larger than the sum of its proper divisors (20371364).

25231564 is a wasteful number, since it uses less digits than its factorization.

25231564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305 (or 1303 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The square root of 25231564 is about 5023.1030250235. The cubic root of 25231564 is about 293.3017969999.

The spelling of 25231564 in words is "twenty-five million, two hundred thirty-one thousand, five hundred sixty-four".