23113505231 has 2 divisors, whose sum is σ = 23113505232. Its totient is φ = 23113505230.

The previous prime is 23113505213. The next prime is 23113505237. The reversal of 23113505231 is 13250531132.

Together with previous prime (23113505213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23113505231 is a prime.

It is a super-2 number, since 2×23113505231² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23113505231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (23113505237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11556752615 + 11556752616.

It is an arithmetic number, because the mean of its divisors is an integer number (11556752616).

Almost surely, 2^23113505231 is an apocalyptic number.

23113505231 is a deficient number, since it is larger than the sum of its proper divisors (1).

23113505231 is an equidigital number, since it uses as much as digits as its factorization.

23113505231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 26.

The spelling of 23113505231 in words is "twenty-three billion, one hundred thirteen million, five hundred five thousand, two hundred thirty-one".