13331231 has 2 divisors, whose sum is σ = 13331232. Its totient is φ = 13331230.

The previous prime is 13331203. The next prime is 13331239. The reversal of 13331231 is 13213331.

It is a strong prime.

It is an emirp because it is prime and its reverse (13213331) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 13331231 - 2⁶ = 13331167 is a prime.

It is a super-2 number, since 2×13331231² = 355443439950722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13331239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6665615 + 6665616.

It is an arithmetic number, because the mean of its divisors is an integer number (6665616).

Almost surely, 2^13331231 is an apocalyptic number.

13331231 is a deficient number, since it is larger than the sum of its proper divisors (1).

13331231 is an equidigital number, since it uses as much as digits as its factorization.

13331231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 162, while the sum is 17.

The square root of 13331231 is about 3651.1958315051. The cubic root of 13331231 is about 237.1137566853.

Adding to 13331231 its reverse (13213331), we get a palindrome (26544562).

The spelling of 13331231 in words is "thirteen million, three hundred thirty-one thousand, two hundred thirty-one".