233131122013 has 4 divisors (see below), whose sum is σ = 235534535740. Its totient is φ = 230727708288.

The previous prime is 233131121999. The next prime is 233131122023. The reversal of 233131122013 is 310221131332.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112931618809 + 120199503204 = 336053^2 + 346698^2 .

It is a cyclic number.

It is not a de Polignac number, because 233131122013 - 2²⁵ = 233097567581 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 (233131122023) 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, 1201706718 + ... + 1201706911.

It is an arithmetic number, because the mean of its divisors is an integer number (58883633935).

Almost surely, 2^233131122013 is an apocalyptic number.

It is an amenable number.

233131122013 is a deficient number, since it is larger than the sum of its proper divisors (2403413727).

233131122013 is an equidigital number, since it uses as much as digits as its factorization.

233131122013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2403413726.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 233131122013 its reverse (310221131332), we get a palindrome (543352253345).

The spelling of 233131122013 in words is "two hundred thirty-three billion, one hundred thirty-one million, one hundred twenty-two thousand, thirteen".