231311320013 has 8 divisors (see below), whose sum is σ = 233612573376. Its totient is φ = 229011134400.

The previous prime is 231311319983. The next prime is 231311320021. The reversal of 231311320013 is 310023113132.

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 231311320013 - 2⁶ = 231311319949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231311320073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172058 + ... + 701588.

It is an arithmetic number, because the mean of its divisors is an integer number (29201571672).

Almost surely, 2^231311320013 is an apocalyptic number.

It is an amenable number.

231311320013 is a deficient number, since it is larger than the sum of its proper divisors (2301253363).

231311320013 is a wasteful number, since it uses less digits than its factorization.

231311320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 533875.

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

Adding to 231311320013 its reverse (310023113132), we get a palindrome (541334433145).

The spelling of 231311320013 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred twenty thousand, thirteen".