13239511331 has 2 divisors, whose sum is σ = 13239511332. Its totient is φ = 13239511330.

The previous prime is 13239511319. The next prime is 13239511339. The reversal of 13239511331 is 13311593231.

It is a strong prime.

It is an emirp because it is prime and its reverse (13311593231) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13239511331 is a prime.

It is a super-2 number, since 2×13239511331² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13239511339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6619755665 + 6619755666.

It is an arithmetic number, because the mean of its divisors is an integer number (6619755666).

Almost surely, 2^13239511331 is an apocalyptic number.

13239511331 is a deficient number, since it is larger than the sum of its proper divisors (1).

13239511331 is an equidigital number, since it uses as much as digits as its factorization.

13239511331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7290, while the sum is 32.

The spelling of 13239511331 in words is "thirteen billion, two hundred thirty-nine million, five hundred eleven thousand, three hundred thirty-one".