311131248460387 has 2 divisors, whose sum is σ = 311131248460388. Its totient is φ = 311131248460386.

The previous prime is 311131248460343. The next prime is 311131248460463. The reversal of 311131248460387 is 783064842131113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311131248460387 - 2⁷ = 311131248460259 is a prime.

It is not a weakly prime, because it can be changed into another prime (311131248160387) 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, 155565624230193 + 155565624230194.

It is an arithmetic number, because the mean of its divisors is an integer number (155565624230194).

Almost surely, 2^{311131248460387} is an apocalyptic number.

311131248460387 is a deficient number, since it is larger than the sum of its proper divisors (1).

311131248460387 is an equidigital number, since it uses as much as digits as its factorization.

311131248460387 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2322432, while the sum is 52.

The spelling of 311131248460387 in words is "three hundred eleven trillion, one hundred thirty-one billion, two hundred forty-eight million, four hundred sixty thousand, three hundred eighty-seven".