23031203131 has 4 divisors (see below), whose sum is σ = 23061871264. Its totient is φ = 23000535000.

The previous prime is 23031203099. The next prime is 23031203201. The reversal of 23031203131 is 13130213032.

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

It is a cyclic number.

It is not a de Polignac number, because 23031203131 - 2⁵ = 23031203099 is a prime.

It is a super-2 number, since 2×23031203131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23031203099 and 23031203108.

It is not an unprimeable number, because it can be changed into a prime (23031200131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15332940 + ... + 15334441.

It is an arithmetic number, because the mean of its divisors is an integer number (5765467816).

Almost surely, 2^23031203131 is an apocalyptic number.

23031203131 is a deficient number, since it is larger than the sum of its proper divisors (30668133).

23031203131 is an equidigital number, since it uses as much as digits as its factorization.

23031203131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30668132.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 23031203131 its reverse (13130213032), we get a palindrome (36161416163).

Subtracting from 23031203131 its reverse (13130213032), we obtain a palindrome (9900990099).

The spelling of 23031203131 in words is "twenty-three billion, thirty-one million, two hundred three thousand, one hundred thirty-one".