231320233013 has 4 divisors (see below), whose sum is σ = 231322561920. Its totient is φ = 231317904108.

The previous prime is 231320233003. The next prime is 231320233043. The reversal of 231320233013 is 310332023132.

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 231320233013 - 2²⁴ = 231303455797 is a prime.

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 231320233013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231320233003) 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, 1008503 + ... + 1216436.

It is an arithmetic number, because the mean of its divisors is an integer number (57830640480).

Almost surely, 2^231320233013 is an apocalyptic number.

It is an amenable number.

231320233013 is a deficient number, since it is larger than the sum of its proper divisors (2328907).

231320233013 is a wasteful number, since it uses less digits than its factorization.

231320233013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2328906.

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 231320233013 its reverse (310332023132), we get a palindrome (541652256145).

The spelling of 231320233013 in words is "two hundred thirty-one billion, three hundred twenty million, two hundred thirty-three thousand, thirteen".