13220916 has 12 divisors (see below), whose sum is σ = 30848832. Its totient is φ = 4406968.

The previous prime is 13220899. The next prime is 13220947. The reversal of 13220916 is 61902231.

13220916 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a congruent number.

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, 550860 + ... + 550883.

It is an arithmetic number, because the mean of its divisors is an integer number (2570736).

Almost surely, 2^13220916 is an apocalyptic number.

It is an amenable number.

13220916 is an abundant number, since it is smaller than the sum of its proper divisors (17627916).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13220916 is a wasteful number, since it uses less digits than its factorization.

13220916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101750 (or 1101748 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 24.

The square root of 13220916 is about 3636.0577553169. The cubic root of 13220916 is about 236.4579110931.

The spelling of 13220916 in words is "thirteen million, two hundred twenty thousand, nine hundred sixteen".