13215522 has 8 divisors (see below), whose sum is σ = 26431056. Its totient is φ = 4405172.

The previous prime is 13215479. The next prime is 13215533. The reversal of 13215522 is 22551231.

It is a sphenic number, since it is the product of 3 distinct primes.

13215522 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1101288 + ... + 1101299.

It is an arithmetic number, because the mean of its divisors is an integer number (3303882).

Almost surely, 2^13215522 is an apocalyptic number.

13215522 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

13215522 is a wasteful number, since it uses less digits than its factorization.

13215522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2202592.

The product of its digits is 600, while the sum is 21.

The square root of 13215522 is about 3635.3159422532. The cubic root of 13215522 is about 236.4257492401.

Adding to 13215522 its reverse (22551231), we get a palindrome (35766753).

The spelling of 13215522 in words is "thirteen million, two hundred fifteen thousand, five hundred twenty-two".