311456562397 has 2 divisors, whose sum is σ = 311456562398. Its totient is φ = 311456562396.

The previous prime is 311456562337. The next prime is 311456562451. The reversal of 311456562397 is 793265654113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 265337281881 + 46119280516 = 515109^2 + 214754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311456562397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311456562317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155728281198 + 155728281199.

It is an arithmetic number, because the mean of its divisors is an integer number (155728281199).

Almost surely, 2^311456562397 is an apocalyptic number.

It is an amenable number.

311456562397 is a deficient number, since it is larger than the sum of its proper divisors (1).

311456562397 is an equidigital number, since it uses as much as digits as its factorization.

311456562397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4082400, while the sum is 52.

The spelling of 311456562397 in words is "three hundred eleven billion, four hundred fifty-six million, five hundred sixty-two thousand, three hundred ninety-seven".