13232321731 has 2 divisors, whose sum is σ = 13232321732. Its totient is φ = 13232321730.

The previous prime is 13232321693. The next prime is 13232321737. The reversal of 13232321731 is 13712323231.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13232321731 is a prime.

It is a super-2 number, since 2×13232321731² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13232321731.

It is not a weakly prime, because it can be changed into another prime (13232321737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6616160865 + 6616160866.

It is an arithmetic number, because the mean of its divisors is an integer number (6616160866).

Almost surely, 2^13232321731 is an apocalyptic number.

13232321731 is a deficient number, since it is larger than the sum of its proper divisors (1).

13232321731 is an equidigital number, since it uses as much as digits as its factorization.

13232321731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4536, while the sum is 28.

Adding to 13232321731 its reverse (13712323231), we get a palindrome (26944644962).

The spelling of 13232321731 in words is "thirteen billion, two hundred thirty-two million, three hundred twenty-one thousand, seven hundred thirty-one".