231310320013 has 4 divisors (see below), whose sum is σ = 231793223040. Its totient is φ = 230827416988.

The previous prime is 231310319963. The next prime is 231310320023. The reversal of 231310320013 is 310023013132.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 231310320013 - 2⁹ = 231310319501 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 (231310320023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241450795 + ... + 241451752.

It is an arithmetic number, because the mean of its divisors is an integer number (57948305760).

Almost surely, 2^231310320013 is an apocalyptic number.

It is an amenable number.

231310320013 is a deficient number, since it is larger than the sum of its proper divisors (482903027).

231310320013 is an equidigital number, since it uses as much as digits as its factorization.

231310320013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482903026.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 231310320013 its reverse (310023013132), we get a palindrome (541333333145).

The spelling of 231310320013 in words is "two hundred thirty-one billion, three hundred ten million, three hundred twenty thousand, thirteen".