23131231231 has 8 divisors (see below), whose sum is σ = 23282400944. Its totient is φ = 22980110400.

The previous prime is 23131231229. The next prime is 23131231243. The reversal of 23131231231 is 13213213132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 23131231231 - 2¹ = 23131231229 is a prime.

It is a super-2 number, since 2×23131231231² (a number of 22 digits) contains 22 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 (23131211231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1851556 + ... + 1864006.

It is an arithmetic number, because the mean of its divisors is an integer number (2910300118).

Almost surely, 2^23131231231 is an apocalyptic number.

23131231231 is a deficient number, since it is larger than the sum of its proper divisors (151169713).

23131231231 is a wasteful number, since it uses less digits than its factorization.

23131231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24441.

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

Adding to 23131231231 its reverse (13213213132), we get a palindrome (36344444363).

The spelling of 23131231231 in words is "twenty-three billion, one hundred thirty-one million, two hundred thirty-one thousand, two hundred thirty-one".