31323324391 has 2 divisors, whose sum is σ = 31323324392. Its totient is φ = 31323324390.

The previous prime is 31323324379. The next prime is 31323324397. The reversal of 31323324391 is 19342332313.

It is a strong prime.

It is an emirp because it is prime and its reverse (19342332313) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31323324391 - 2⁹ = 31323323879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31323324397) 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, 15661662195 + 15661662196.

It is an arithmetic number, because the mean of its divisors is an integer number (15661662196).

Almost surely, 2^31323324391 is an apocalyptic number.

31323324391 is a deficient number, since it is larger than the sum of its proper divisors (1).

31323324391 is an equidigital number, since it uses as much as digits as its factorization.

31323324391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 34.

The spelling of 31323324391 in words is "thirty-one billion, three hundred twenty-three million, three hundred twenty-four thousand, three hundred ninety-one".