311456161 has 2 divisors, whose sum is σ = 311456162. Its totient is φ = 311456160.

The previous prime is 311456153. The next prime is 311456177. The reversal of 311456161 is 161654113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 268304400 + 43151761 = 16380^2 + 6569^2 .

It is a cyclic number.

It is not a de Polignac number, because 311456161 - 2³ = 311456153 is a prime.

It is not a weakly prime, because it can be changed into another prime (311456191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155728080 + 155728081.

It is an arithmetic number, because the mean of its divisors is an integer number (155728081).

Almost surely, 2^311456161 is an apocalyptic number.

It is an amenable number.

311456161 is a deficient number, since it is larger than the sum of its proper divisors (1).

311456161 is an equidigital number, since it uses as much as digits as its factorization.

311456161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 28.

The square root of 311456161 is about 17648.1206081554. The cubic root of 311456161 is about 677.8479839774.

The spelling of 311456161 in words is "three hundred eleven million, four hundred fifty-six thousand, one hundred sixty-one".