23131134561 has 16 divisors (see below), whose sum is σ = 32272524800. Its totient is φ = 14718879360.

The previous prime is 23131134539. The next prime is 23131134589. The reversal of 23131134561 is 16543113132.

It is not a de Polignac number, because 23131134561 - 2⁵ = 23131134529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (23131134511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1696786 + ... + 1710363.

It is an arithmetic number, because the mean of its divisors is an integer number (2017032800).

Almost surely, 2^23131134561 is an apocalyptic number.

It is an amenable number.

23131134561 is a deficient number, since it is larger than the sum of its proper divisors (9141390239).

23131134561 is a wasteful number, since it uses less digits than its factorization.

23131134561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3407256.

The product of its digits is 6480, while the sum is 30.

Adding to 23131134561 its reverse (16543113132), we get a palindrome (39674247693).

The spelling of 23131134561 in words is "twenty-three billion, one hundred thirty-one million, one hundred thirty-four thousand, five hundred sixty-one".