13312231 has 2 divisors, whose sum is σ = 13312232. Its totient is φ = 13312230.

The previous prime is 13312199. The next prime is 13312253. The reversal of 13312231 is 13221331.

13312231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13312231 - 2⁵ = 13312199 is a prime.

It is a super-2 number, since 2×13312231² = 354430988394722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13312261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6656115 + 6656116.

It is an arithmetic number, because the mean of its divisors is an integer number (6656116).

Almost surely, 2^13312231 is an apocalyptic number.

13312231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13312231 is an equidigital number, since it uses as much as digits as its factorization.

13312231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108, while the sum is 16.

The square root of 13312231 is about 3648.5930164928. The cubic root of 13312231 is about 237.0010563312.

Adding to 13312231 its reverse (13221331), we get a palindrome (26533562).

The spelling of 13312231 in words is "thirteen million, three hundred twelve thousand, two hundred thirty-one".