231310021223 has 4 divisors (see below), whose sum is σ = 231397080720. Its totient is φ = 231222961728.

The previous prime is 231310021207. The next prime is 231310021231. The reversal of 231310021223 is 322120013132.

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 231310021223 - 2⁴ = 231310021207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 231310021195 and 231310021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231310021273) 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, 43525763 + ... + 43531076.

It is an arithmetic number, because the mean of its divisors is an integer number (57849270180).

Almost surely, 2^231310021223 is an apocalyptic number.

231310021223 is a deficient number, since it is larger than the sum of its proper divisors (87059497).

231310021223 is an equidigital number, since it uses as much as digits as its factorization.

231310021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87059496.

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

Adding to 231310021223 its reverse (322120013132), we get a palindrome (553430034355).

The spelling of 231310021223 in words is "two hundred thirty-one billion, three hundred ten million, twenty-one thousand, two hundred twenty-three".