311323131023 has 2 divisors, whose sum is σ = 311323131024. Its totient is φ = 311323131022.

The previous prime is 311323131019. The next prime is 311323131037. The reversal of 311323131023 is 320131323113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311323131023 - 2² = 311323131019 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311323131023.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311323131013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155661565511 + 155661565512.

It is an arithmetic number, because the mean of its divisors is an integer number (155661565512).

Almost surely, 2^311323131023 is an apocalyptic number.

311323131023 is a deficient number, since it is larger than the sum of its proper divisors (1).

311323131023 is an equidigital number, since it uses as much as digits as its factorization.

311323131023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 311323131023 its reverse (320131323113), we get a palindrome (631454454136).

The spelling of 311323131023 in words is "three hundred eleven billion, three hundred twenty-three million, one hundred thirty-one thousand, twenty-three".