13215572 has 6 divisors (see below), whose sum is σ = 23127258. Its totient is φ = 6607784.

The previous prime is 13215569. The next prime is 13215581. The reversal of 13215572 is 27551231.

13215572 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 only one way, i.e., 7474756 + 5740816 = 2734^2 + 2396^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1651943 + ... + 1651950.

It is an arithmetic number, because the mean of its divisors is an integer number (3854543).

Almost surely, 2^13215572 is an apocalyptic number.

It is an amenable number.

13215572 is a deficient number, since it is larger than the sum of its proper divisors (9911686).

13215572 is a wasteful number, since it uses less digits than its factorization.

13215572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3303897 (or 3303895 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 13215572 is about 3635.3228192280. The cubic root of 13215572 is about 236.4260474065.

The spelling of 13215572 in words is "thirteen million, two hundred fifteen thousand, five hundred seventy-two".