13312564 has 24 divisors (see below), whose sum is σ = 24864840. Its totient is φ = 6214656.

The previous prime is 13312553. The next prime is 13312589. The reversal of 13312564 is 46521331.

It can be written as a sum of positive squares in 4 ways, for example, as 1340964 + 11971600 = 1158^2 + 3460^2 .

It is a congruent number.

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, 8602 + ... + 10030.

It is an arithmetic number, because the mean of its divisors is an integer number (1036035).

Almost surely, 2^13312564 is an apocalyptic number.

It is an amenable number.

13312564 is a deficient number, since it is larger than the sum of its proper divisors (11552276).

13312564 is a wasteful number, since it uses less digits than its factorization.

13312564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587 (or 1585 counting only the distinct ones).

The product of its digits is 2160, while the sum is 25.

The square root of 13312564 is about 3648.6386502366. The cubic root of 13312564 is about 237.0030324762.

Adding to 13312564 its reverse (46521331), we get a palindrome (59833895).

The spelling of 13312564 in words is "thirteen million, three hundred twelve thousand, five hundred sixty-four".