13215631291 has 2 divisors, whose sum is σ = 13215631292. Its totient is φ = 13215631290.

The previous prime is 13215631283. The next prime is 13215631301. The reversal of 13215631291 is 19213651231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13215631291 - 2³ = 13215631283 is a prime.

It is not a weakly prime, because it can be changed into another prime (13215635291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6607815645 + 6607815646.

It is an arithmetic number, because the mean of its divisors is an integer number (6607815646).

Almost surely, 2^13215631291 is an apocalyptic number.

13215631291 is a deficient number, since it is larger than the sum of its proper divisors (1).

13215631291 is an equidigital number, since it uses as much as digits as its factorization.

13215631291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9720, while the sum is 34.

The spelling of 13215631291 in words is "thirteen billion, two hundred fifteen million, six hundred thirty-one thousand, two hundred ninety-one".