231031303013 has 4 divisors (see below), whose sum is σ = 264035774880. Its totient is φ = 198026831148.

The previous prime is 231031302973. The next prime is 231031303021. The reversal of 231031303013 is 310303130132.

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 231031303013 - 2¹⁶ = 231031237477 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 (231031303513) 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, 16502235923 + ... + 16502235936.

It is an arithmetic number, because the mean of its divisors is an integer number (66008943720).

Almost surely, 2^231031303013 is an apocalyptic number.

It is an amenable number.

231031303013 is a deficient number, since it is larger than the sum of its proper divisors (33004471867).

231031303013 is an equidigital number, since it uses as much as digits as its factorization.

231031303013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33004471866.

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 231031303013 its reverse (310303130132), we get a palindrome (541334433145).

The spelling of 231031303013 in words is "two hundred thirty-one billion, thirty-one million, three hundred three thousand, thirteen".