13323231 has 16 divisors (see below), whose sum is σ = 20160000. Its totient is φ = 8692344.

The previous prime is 13323227. The next prime is 13323251. The reversal of 13323231 is 13232331.

13323231 = 329² + 330² + ... + 422².

13323231 is nontrivially palindromic in base 5.

It is not a de Polignac number, because 13323231 - 2² = 13323227 is a prime.

It is a super-2 number, since 2×13323231² = 355016968558722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13323251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3981 + ... + 6518.

It is an arithmetic number, because the mean of its divisors is an integer number (1260000).

Almost surely, 2^13323231 is an apocalyptic number.

13323231 is a deficient number, since it is larger than the sum of its proper divisors (6836769).

13323231 is a wasteful number, since it uses less digits than its factorization.

13323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10555 (or 10549 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 13323231 is about 3650.1001356127. The cubic root of 13323231 is about 237.0663169647.

Adding to 13323231 its reverse (13232331), we get a palindrome (26555562).

The spelling of 13323231 in words is "thirteen million, three hundred twenty-three thousand, two hundred thirty-one".