13320311231 has 8 divisors (see below), whose sum is σ = 13575527424. Its totient is φ = 13065239200.

The previous prime is 13320311227. The next prime is 13320311237. The reversal of 13320311231 is 13211302331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13320311231 - 2² = 13320311227 is a prime.

It is a super-2 number, since 2×13320311231² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13320311237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160706 + ... + 229056.

It is an arithmetic number, because the mean of its divisors is an integer number (1696940928).

Almost surely, 2^13320311231 is an apocalyptic number.

13320311231 is a deficient number, since it is larger than the sum of its proper divisors (255216193).

13320311231 is an equidigital number, since it uses as much as digits as its factorization.

13320311231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72081.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 13320311231 its reverse (13211302331), we get a palindrome (26531613562).

The spelling of 13320311231 in words is "thirteen billion, three hundred twenty million, three hundred eleven thousand, two hundred thirty-one".