13223656 has 16 divisors (see below), whose sum is σ = 25165440. Its totient is φ = 6512880.

The previous prime is 13223647. The next prime is 13223669. The reversal of 13223656 is 65632231.

13223656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11800 + ... + 12871.

It is an arithmetic number, because the mean of its divisors is an integer number (1572840).

Almost surely, 2^13223656 is an apocalyptic number.

It is an amenable number.

13223656 is a deficient number, since it is larger than the sum of its proper divisors (11941784).

13223656 is a wasteful number, since it uses less digits than its factorization.

13223656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24744 (or 24740 counting only the distinct ones).

The product of its digits is 6480, while the sum is 28.

The square root of 13223656 is about 3636.4345174910. The cubic root of 13223656 is about 236.4742450577.

Adding to 13223656 its reverse (65632231), we get a palindrome (78855887).

The spelling of 13223656 in words is "thirteen million, two hundred twenty-three thousand, six hundred fifty-six".