31233031013 has 4 divisors (see below), whose sum is σ = 31762404480. Its totient is φ = 30703657548.

The previous prime is 31233030973. The next prime is 31233031097. The reversal of 31233031013 is 31013033213.

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 31233031013 - 2²⁰ = 31231982437 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 (31233001013) 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, 264686645 + ... + 264686762.

It is an arithmetic number, because the mean of its divisors is an integer number (7940601120).

Almost surely, 2^31233031013 is an apocalyptic number.

It is an amenable number.

31233031013 is a deficient number, since it is larger than the sum of its proper divisors (529373467).

31233031013 is an equidigital number, since it uses as much as digits as its factorization.

31233031013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529373466.

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

Adding to 31233031013 its reverse (31013033213), we get a palindrome (62246064226).

It can be divided in two parts, 312330 and 31013, that added together give a palindrome (343343).

The spelling of 31233031013 in words is "thirty-one billion, two hundred thirty-three million, thirty-one thousand, thirteen".