31023131323199 has 2 divisors, whose sum is σ = 31023131323200. Its totient is φ = 31023131323198.

The previous prime is 31023131323187. The next prime is 31023131323243. The reversal of 31023131323199 is 99132313132013.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31023131323199 - 2²⁰ = 31023130274623 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31023131323109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15511565661599 + 15511565661600.

It is an arithmetic number, because the mean of its divisors is an integer number (15511565661600).

Almost surely, 2^{31023131323199} is an apocalyptic number.

31023131323199 is a deficient number, since it is larger than the sum of its proper divisors (1).

31023131323199 is an equidigital number, since it uses as much as digits as its factorization.

31023131323199 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 78732, while the sum is 41.

The spelling of 31023131323199 in words is "thirty-one trillion, twenty-three billion, one hundred thirty-one million, three hundred twenty-three thousand, one hundred ninety-nine".