311320417 has 2 divisors, whose sum is σ = 311320418. Its totient is φ = 311320416.

The previous prime is 311320381. The next prime is 311320441. The reversal of 311320417 is 714023113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 176783616 + 134536801 = 13296^2 + 11599^2 .

It is an emirp because it is prime and its reverse (714023113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311320417 - 2¹⁵ = 311287649 is a prime.

It is not a weakly prime, because it can be changed into another prime (311326417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155660208 + 155660209.

It is an arithmetic number, because the mean of its divisors is an integer number (155660209).

Almost surely, 2^311320417 is an apocalyptic number.

It is an amenable number.

311320417 is a deficient number, since it is larger than the sum of its proper divisors (1).

311320417 is an equidigital number, since it uses as much as digits as its factorization.

311320417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 311320417 is about 17644.2743404199. The cubic root of 311320417 is about 677.7494926763.

The spelling of 311320417 in words is "three hundred eleven million, three hundred twenty thousand, four hundred seventeen".