13216564 has 12 divisors (see below), whose sum is σ = 23192064. Its totient is φ = 6590264.

The previous prime is 13216561. The next prime is 13216583. The reversal of 13216564 is 46561231.

13216564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13216561) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2782 + ... + 5845.

It is an arithmetic number, because the mean of its divisors is an integer number (1932672).

Almost surely, 2^13216564 is an apocalyptic number.

It is an amenable number.

13216564 is a deficient number, since it is larger than the sum of its proper divisors (9975500).

13216564 is a wasteful number, since it uses less digits than its factorization.

13216564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9014 (or 9012 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 13216564 is about 3635.4592557200. The cubic root of 13216564 is about 236.4319628718.

Adding to 13216564 its reverse (46561231), we get a palindrome (59777795).

The spelling of 13216564 in words is "thirteen million, two hundred sixteen thousand, five hundred sixty-four".