13522331 has 4 divisors (see below), whose sum is σ = 13530000. Its totient is φ = 13514664.

The previous prime is 13522307. The next prime is 13522349. The reversal of 13522331 is 13322531.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 13522331 - 2²² = 9328027 is a prime.

It is a super-2 number, since 2×13522331² = 365706871347122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13522391) 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, 290 + ... + 5208.

It is an arithmetic number, because the mean of its divisors is an integer number (3382500).

Almost surely, 2^13522331 is an apocalyptic number.

13522331 is a deficient number, since it is larger than the sum of its proper divisors (7669).

13522331 is an equidigital number, since it uses as much as digits as its factorization.

13522331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its digits is 540, while the sum is 20.

The square root of 13522331 is about 3677.2722227216. The cubic root of 13522331 is about 238.2413752963.

Adding to 13522331 its reverse (13322531), we get a palindrome (26844862).

The spelling of 13522331 in words is "thirteen million, five hundred twenty-two thousand, three hundred thirty-one".