23011223231 has 4 divisors (see below), whose sum is σ = 23354674392. Its totient is φ = 22667772072.

The previous prime is 23011223201. The next prime is 23011223233. The reversal of 23011223231 is 13232211032.

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 23011223231 - 2⁶ = 23011223167 is a prime.

It is a super-2 number, since 2×23011223231² (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 (23011223233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 171725480 + ... + 171725613.

It is an arithmetic number, because the mean of its divisors is an integer number (5838668598).

Almost surely, 2^23011223231 is an apocalyptic number.

23011223231 is a deficient number, since it is larger than the sum of its proper divisors (343451161).

23011223231 is an equidigital number, since it uses as much as digits as its factorization.

23011223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343451160.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 23011223231 its reverse (13232211032), we get a palindrome (36243434263).

The spelling of 23011223231 in words is "twenty-three billion, eleven million, two hundred twenty-three thousand, two hundred thirty-one".