311319971 has 2 divisors, whose sum is σ = 311319972. Its totient is φ = 311319970.

The previous prime is 311319947. The next prime is 311320003. The reversal of 311319971 is 179913113.

It is a weak prime.

It is an emirp because it is prime and its reverse (179913113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311319971 - 2⁶ = 311319907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311319941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155659985 + 155659986.

It is an arithmetic number, because the mean of its divisors is an integer number (155659986).

Almost surely, 2^311319971 is an apocalyptic number.

311319971 is a deficient number, since it is larger than the sum of its proper divisors (1).

311319971 is an equidigital number, since it uses as much as digits as its factorization.

311319971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5103, while the sum is 35.

The square root of 311319971 is about 17644.2617017545. The cubic root of 311319971 is about 677.7491690265.

The spelling of 311319971 in words is "three hundred eleven million, three hundred nineteen thousand, nine hundred seventy-one".