13217572 has 12 divisors (see below), whose sum is σ = 23166220. Its totient is φ = 6598656.

The previous prime is 13217543. The next prime is 13217579. The reversal of 13217572 is 27571231.

13217572 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 6120676 + 7096896 = 2474^2 + 2664^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 13217572.

It is not an unprimeable number, because it can be changed into a prime (13217579) 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, 928 + ... + 5224.

Almost surely, 2^13217572 is an apocalyptic number.

It is an amenable number.

13217572 is a deficient number, since it is larger than the sum of its proper divisors (9948648).

13217572 is a wasteful number, since it uses less digits than its factorization.

13217572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5070 (or 5068 counting only the distinct ones).

The product of its digits is 2940, while the sum is 28.

The square root of 13217572 is about 3635.5978875558. The cubic root of 13217572 is about 236.4379734446.

The spelling of 13217572 in words is "thirteen million, two hundred seventeen thousand, five hundred seventy-two".