231311132999 has 2 divisors, whose sum is σ = 231311133000. Its totient is φ = 231311132998.

The previous prime is 231311132977. The next prime is 231311133019. The reversal of 231311132999 is 999231113132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231311132999 - 2⁸ = 231311132743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231311132929) 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, 115655566499 + 115655566500.

It is an arithmetic number, because the mean of its divisors is an integer number (115655566500).

Almost surely, 2^231311132999 is an apocalyptic number.

231311132999 is a deficient number, since it is larger than the sum of its proper divisors (1).

231311132999 is an equidigital number, since it uses as much as digits as its factorization.

231311132999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 78732, while the sum is 44.

The spelling of 231311132999 in words is "two hundred thirty-one billion, three hundred eleven million, one hundred thirty-two thousand, nine hundred ninety-nine".