231311131223 has 2 divisors, whose sum is σ = 231311131224. Its totient is φ = 231311131222.

The previous prime is 231311131153. The next prime is 231311131279. The reversal of 231311131223 is 322131113132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231311131223 - 2¹⁰ = 231311130199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231311131283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115655565611 + 115655565612.

It is an arithmetic number, because the mean of its divisors is an integer number (115655565612).

Almost surely, 2^231311131223 is an apocalyptic number.

231311131223 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311131223 is an equidigital number, since it uses as much as digits as its factorization.

231311131223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

Adding to 231311131223 its reverse (322131113132), we get a palindrome (553442244355).

The spelling of 231311131223 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred thirty-one thousand, two hundred twenty-three".