231311323247 has 2 divisors, whose sum is σ = 231311323248. Its totient is φ = 231311323246.

The previous prime is 231311323181. The next prime is 231311323261. The reversal of 231311323247 is 742323113132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231311323247 - 2¹⁸ = 231311061103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231311323147) 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, 115655661623 + 115655661624.

It is an arithmetic number, because the mean of its divisors is an integer number (115655661624).

Almost surely, 2^231311323247 is an apocalyptic number.

231311323247 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311323247 is an equidigital number, since it uses as much as digits as its factorization.

231311323247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18144, while the sum is 32.

Adding to 231311323247 its reverse (742323113132), we get a palindrome (973634436379).

The spelling of 231311323247 in words is "two hundred thirty-one billion, three hundred eleven million, three hundred twenty-three thousand, two hundred forty-seven".