311933342881 has 2 divisors, whose sum is σ = 311933342882. Its totient is φ = 311933342880.

The previous prime is 311933342879. The next prime is 311933342953. The reversal of 311933342881 is 188243339113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161249630481 + 150683712400 = 401559^2 + 388180^2 .

It is a cyclic number.

It is not a de Polignac number, because 311933342881 - 2¹ = 311933342879 is a prime.

It is a super-2 number, since 2×311933342881² (a number of 24 digits) contains 22 as substring.

Together with 311933342879, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (311933342801) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155966671440 + 155966671441.

It is an arithmetic number, because the mean of its divisors is an integer number (155966671441).

Almost surely, 2^311933342881 is an apocalyptic number.

It is an amenable number.

311933342881 is a deficient number, since it is larger than the sum of its proper divisors (1).

311933342881 is an equidigital number, since it uses as much as digits as its factorization.

311933342881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 373248, while the sum is 46.

The spelling of 311933342881 in words is "three hundred eleven billion, nine hundred thirty-three million, three hundred forty-two thousand, eight hundred eighty-one".