231031311223 has 2 divisors, whose sum is σ = 231031311224. Its totient is φ = 231031311222.

The previous prime is 231031311169. The next prime is 231031311229. The reversal of 231031311223 is 322113130132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231031311223 - 2²⁵ = 230997756791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231031311194 and 231031311203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231031311229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115515655611 + 115515655612.

It is an arithmetic number, because the mean of its divisors is an integer number (115515655612).

Almost surely, 2^231031311223 is an apocalyptic number.

231031311223 is a deficient number, since it is larger than the sum of its proper divisors (1).

231031311223 is an equidigital number, since it uses as much as digits as its factorization.

231031311223 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 231031311223 its reverse (322113130132), we get a palindrome (553144441355).

The spelling of 231031311223 in words is "two hundred thirty-one billion, thirty-one million, three hundred eleven thousand, two hundred twenty-three".