23231222231 has 4 divisors (see below), whose sum is σ = 26549968272. Its totient is φ = 19912476192.

The previous prime is 23231222221. The next prime is 23231222239. The reversal of 23231222231 is 13222213232.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 23231222231 - 2²⁶ = 23164113367 is a prime.

It is a super-2 number, since 2×23231222231² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23231222197 and 23231222206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23231222239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1659373010 + ... + 1659373023.

It is an arithmetic number, because the mean of its divisors is an integer number (6637492068).

Almost surely, 2^23231222231 is an apocalyptic number.

23231222231 is a deficient number, since it is larger than the sum of its proper divisors (3318746041).

23231222231 is an equidigital number, since it uses as much as digits as its factorization.

23231222231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3318746040.

The product of its digits is 1728, while the sum is 23.

Adding to 23231222231 its reverse (13222213232), we get a palindrome (36453435463).

The spelling of 23231222231 in words is "twenty-three billion, two hundred thirty-one million, two hundred twenty-two thousand, two hundred thirty-one".