13522231 has 6 divisors (see below), whose sum is σ = 13973496. Its totient is φ = 13085100.

The previous prime is 13522219. The next prime is 13522237. The reversal of 13522231 is 13222531.

It is not a de Polignac number, because 13522231 - 2¹¹ = 13520183 is a prime.

It is a super-2 number, since 2×13522231² = 365701462434722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13522199 and 13522208.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 6075 + ... + 7996.

It is an arithmetic number, because the mean of its divisors is an integer number (2328916).

Almost surely, 2^13522231 is an apocalyptic number.

13522231 is a deficient number, since it is larger than the sum of its proper divisors (451265).

13522231 is an equidigital number, since it uses as much as digits as its factorization.

13522231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14133 (or 14102 counting only the distinct ones).

The product of its digits is 360, while the sum is 19.

The square root of 13522231 is about 3677.2586256612. The cubic root of 13522231 is about 238.2407880160.

Adding to 13522231 its reverse (13222531), we get a palindrome (26744762).

It can be divided in two parts, 135 and 22231, that added together give a triangular number (22366 = T₂₁₁).

The spelling of 13522231 in words is "thirteen million, five hundred twenty-two thousand, two hundred thirty-one".