13221596831 has 2 divisors, whose sum is σ = 13221596832. Its totient is φ = 13221596830.

The previous prime is 13221596827. The next prime is 13221596849. The reversal of 13221596831 is 13869512231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13221596831 - 2² = 13221596827 is a prime.

It is a super-2 number, since 2×13221596831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13221596891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6610798415 + 6610798416.

It is an arithmetic number, because the mean of its divisors is an integer number (6610798416).

Almost surely, 2^13221596831 is an apocalyptic number.

13221596831 is a deficient number, since it is larger than the sum of its proper divisors (1).

13221596831 is an equidigital number, since it uses as much as digits as its factorization.

13221596831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The spelling of 13221596831 in words is "thirteen billion, two hundred twenty-one million, five hundred ninety-six thousand, eight hundred thirty-one".