13231331 has 2 divisors, whose sum is σ = 13231332. Its totient is φ = 13231330.

The previous prime is 13231319. The next prime is 13231333. The reversal of 13231331 is 13313231.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 13231331 - 2¹⁰ = 13230307 is a prime.

It is a super-2 number, since 2×13231331² = 350136240063122, which contains 22 as substring.

Together with 13231333, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13231333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615665 + 6615666.

It is an arithmetic number, because the mean of its divisors is an integer number (6615666).

Almost surely, 2^13231331 is an apocalyptic number.

13231331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231331 is an equidigital number, since it uses as much as digits as its factorization.

13231331 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 13231331 is about 3637.4896563427. The cubic root of 13231331 is about 236.5199860342.

Adding to 13231331 its reverse (13313231), we get a palindrome (26544562).

The spelling of 13231331 in words is "thirteen million, two hundred thirty-one thousand, three hundred thirty-one".