23131131013 has 4 divisors (see below), whose sum is σ = 23131836000. Its totient is φ = 23130426028.

The previous prime is 23131130969. The next prime is 23131131019. The reversal of 23131131013 is 31013113132.

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 23131131013 - 2²¹ = 23129033861 is a prime.

It is a super-3 number, since 3×23131131013³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23131131019) 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, 300745 + ... + 369742.

It is an arithmetic number, because the mean of its divisors is an integer number (5782959000).

Almost surely, 2^23131131013 is an apocalyptic number.

It is an amenable number.

23131131013 is a deficient number, since it is larger than the sum of its proper divisors (704987).

23131131013 is an equidigital number, since it uses as much as digits as its factorization.

23131131013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 704986.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 23131131013 its reverse (31013113132), we get a palindrome (54144244145).

The spelling of 23131131013 in words is "twenty-three billion, one hundred thirty-one million, one hundred thirty-one thousand, thirteen".