311996371 has 2 divisors, whose sum is σ = 311996372. Its totient is φ = 311996370.

The previous prime is 311996341. The next prime is 311996381. The reversal of 311996371 is 173699113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311996371 - 2⁵ = 311996339 is a prime.

It is equal to p_16866454 and since 311996371 and 16866454 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (311996341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155998185 + 155998186.

It is an arithmetic number, because the mean of its divisors is an integer number (155998186).

Almost surely, 2^311996371 is an apocalyptic number.

311996371 is a deficient number, since it is larger than the sum of its proper divisors (1).

311996371 is an equidigital number, since it uses as much as digits as its factorization.

311996371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30618, while the sum is 40.

The square root of 311996371 is about 17663.4190065231. The cubic root of 311996371 is about 678.2396589545.

The spelling of 311996371 in words is "three hundred eleven million, nine hundred ninety-six thousand, three hundred seventy-one".