231313331999 has 2 divisors, whose sum is σ = 231313332000. Its totient is φ = 231313331998.

The previous prime is 231313331971. The next prime is 231313332007. The reversal of 231313331999 is 999133313132.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231313331999 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231313334999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115656665999 + 115656666000.

It is an arithmetic number, because the mean of its divisors is an integer number (115656666000).

Almost surely, 2^231313331999 is an apocalyptic number.

231313331999 is a deficient number, since it is larger than the sum of its proper divisors (1).

231313331999 is an equidigital number, since it uses as much as digits as its factorization.

231313331999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 354294, while the sum is 47.

The spelling of 231313331999 in words is "two hundred thirty-one billion, three hundred thirteen million, three hundred thirty-one thousand, nine hundred ninety-nine".