23213312231 has 4 divisors (see below), whose sum is σ = 23214203232. Its totient is φ = 23212421232.

The previous prime is 23213312153. The next prime is 23213312233. The reversal of 23213312231 is 13221331232.

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 23213312231 - 2¹⁰ = 23213311207 is a prime.

It is a super-2 number, since 2×23213312231² (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 = 23213312197 and 23213312206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23213312233) 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, 405206 + ... + 458931.

It is an arithmetic number, because the mean of its divisors is an integer number (5803550808).

Almost surely, 2^23213312231 is an apocalyptic number.

23213312231 is a deficient number, since it is larger than the sum of its proper divisors (891001).

23213312231 is an equidigital number, since it uses as much as digits as its factorization.

23213312231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 891000.

The product of its digits is 1296, while the sum is 23.

Adding to 23213312231 its reverse (13221331232), we get a palindrome (36434643463).

The spelling of 23213312231 in words is "twenty-three billion, two hundred thirteen million, three hundred twelve thousand, two hundred thirty-one".