231331322113 has 4 divisors (see below), whose sum is σ = 231341138368. Its totient is φ = 231321505860.

The previous prime is 231331322083. The next prime is 231331322137. The reversal of 231331322113 is 311223133132.

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 231331322113 - 2²¹ = 231329224961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231331320113) 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, 4872693 + ... + 4919938.

It is an arithmetic number, because the mean of its divisors is an integer number (57835284592).

Almost surely, 2^231331322113 is an apocalyptic number.

It is an amenable number.

231331322113 is a deficient number, since it is larger than the sum of its proper divisors (9816255).

231331322113 is an equidigital number, since it uses as much as digits as its factorization.

231331322113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9816254.

The product of its digits is 1944, while the sum is 25.

Adding to 231331322113 its reverse (311223133132), we get a palindrome (542554455245).

The spelling of 231331322113 in words is "two hundred thirty-one billion, three hundred thirty-one million, three hundred twenty-two thousand, one hundred thirteen".