13011631 has 2 divisors, whose sum is σ = 13011632. Its totient is φ = 13011630.

The previous prime is 13011623. The next prime is 13011641. The reversal of 13011631 is 13611031.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13011631 - 2³ = 13011623 is a prime.

It is a super-2 number, since 2×13011631² = 338605082560322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13011641) 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, 6505815 + 6505816.

It is an arithmetic number, because the mean of its divisors is an integer number (6505816).

Almost surely, 2^13011631 is an apocalyptic number.

13011631 is a deficient number, since it is larger than the sum of its proper divisors (1).

13011631 is an equidigital number, since it uses as much as digits as its factorization.

13011631 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 13011631 is about 3607.1638443520. The cubic root of 13011631 is about 235.2035719046.

Adding to 13011631 its reverse (13611031), we get a palindrome (26622662).

The spelling of 13011631 in words is "thirteen million, eleven thousand, six hundred thirty-one".