23665111131 has 16 divisors (see below), whose sum is σ = 31901395968. Its totient is φ = 15603132000.

The previous prime is 23665111117. The next prime is 23665111139. The reversal of 23665111131 is 13111156632.

It is not a de Polignac number, because 23665111131 - 2¹⁵ = 23665078363 is a prime.

It is a super-2 number, since 2×23665111131² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23665111139) 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, 231766 + ... + 317876.

It is an arithmetic number, because the mean of its divisors is an integer number (1993837248).

Almost surely, 2^23665111131 is an apocalyptic number.

23665111131 is a deficient number, since it is larger than the sum of its proper divisors (8236284837).

23665111131 is a wasteful number, since it uses less digits than its factorization.

23665111131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87122.

The product of its digits is 3240, while the sum is 30.

Adding to 23665111131 its reverse (13111156632), we get a palindrome (36776267763).

The spelling of 23665111131 in words is "twenty-three billion, six hundred sixty-five million, one hundred eleven thousand, one hundred thirty-one".