13522257 has 12 divisors (see below), whose sum is σ = 22322560. Its totient is φ = 7726968.

The previous prime is 13522247. The next prime is 13522273. The reversal of 13522257 is 75222531.

13522257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13522257 - 2⁴ = 13522241 is a prime.

It is a Duffinian number.

It is a zygodrome in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 13522257.

It is not an unprimeable number, because it can be changed into a prime (13522237) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107257 + ... + 107382.

Almost surely, 2^13522257 is an apocalyptic number.

It is an amenable number.

13522257 is a deficient number, since it is larger than the sum of its proper divisors (8800303).

13522257 is a wasteful number, since it uses less digits than its factorization.

13522257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214652 (or 214649 counting only the distinct ones).

The product of its digits is 4200, while the sum is 27.

The square root of 13522257 is about 3677.2621609018. The cubic root of 13522257 is about 238.2409407091.

Adding to 13522257 its reverse (75222531), we get a palindrome (88744788).

The spelling of 13522257 in words is "thirteen million, five hundred twenty-two thousand, two hundred fifty-seven".