31313230999 has 2 divisors, whose sum is σ = 31313231000. Its totient is φ = 31313230998.

The previous prime is 31313230997. The next prime is 31313231051. The reversal of 31313230999 is 99903231313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31313230999 - 2¹ = 31313230997 is a prime.

Together with 31313230997, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31313230997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656615499 + 15656615500.

It is an arithmetic number, because the mean of its divisors is an integer number (15656615500).

Almost surely, 2^31313230999 is an apocalyptic number.

31313230999 is a deficient number, since it is larger than the sum of its proper divisors (1).

31313230999 is an equidigital number, since it uses as much as digits as its factorization.

31313230999 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 118098, while the sum is 43.

The spelling of 31313230999 in words is "thirty-one billion, three hundred thirteen million, two hundred thirty thousand, nine hundred ninety-nine".