13233323231 has 4 divisors (see below), whose sum is σ = 13317612072. Its totient is φ = 13149034392.

The previous prime is 13233323219. The next prime is 13233323249. The reversal of 13233323231 is 13232333231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13233323231 is a prime.

It is a super-2 number, since 2×13233323231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13233323231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13233323291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42144185 + ... + 42144498.

It is an arithmetic number, because the mean of its divisors is an integer number (3329403018).

Almost surely, 2^13233323231 is an apocalyptic number.

13233323231 is a deficient number, since it is larger than the sum of its proper divisors (84288841).

13233323231 is an equidigital number, since it uses as much as digits as its factorization.

13233323231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84288840.

The product of its digits is 5832, while the sum is 26.

Adding to 13233323231 its reverse (13232333231), we get a palindrome (26465656462).

The spelling of 13233323231 in words is "thirteen billion, two hundred thirty-three million, three hundred twenty-three thousand, two hundred thirty-one".