13131331 has 2 divisors, whose sum is σ = 13131332. Its totient is φ = 13131330.

The previous prime is 13131329. The next prime is 13131341. The reversal of 13131331 is 13313131.

13131331 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13131331 - 2¹ = 13131329 is a prime.

It is a super-2 number, since 2×13131331² = 344863707663122, which contains 22 as substring.

Together with 13131329, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (13131341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6565665 + 6565666.

It is an arithmetic number, because the mean of its divisors is an integer number (6565666).

Almost surely, 2^13131331 is an apocalyptic number.

13131331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13131331 is an equidigital number, since it uses as much as digits as its factorization.

13131331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 81, while the sum is 16.

The square root of 13131331 is about 3623.7178422167. The cubic root of 13131331 is about 235.9226201835.

Adding to 13131331 its reverse (13313131), we get a palindrome (26444462).

The spelling of 13131331 in words is "thirteen million, one hundred thirty-one thousand, three hundred thirty-one".