231312133223 has 4 divisors (see below), whose sum is σ = 231314720760. Its totient is φ = 231309545688.

The previous prime is 231312133201. The next prime is 231312133399. The reversal of 231312133223 is 322331213132.

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 231312133223 - 2⁸ = 231312132967 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231312133192 and 231312133201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231312133123) 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, 1154693 + ... + 1340126.

It is an arithmetic number, because the mean of its divisors is an integer number (57828680190).

Almost surely, 2^231312133223 is an apocalyptic number.

231312133223 is a deficient number, since it is larger than the sum of its proper divisors (2587537).

231312133223 is an equidigital number, since it uses as much as digits as its factorization.

231312133223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2587536.

The product of its digits is 3888, while the sum is 26.

Adding to 231312133223 its reverse (322331213132), we get a palindrome (553643346355).

The spelling of 231312133223 in words is "two hundred thirty-one billion, three hundred twelve million, one hundred thirty-three thousand, two hundred twenty-three".