311949227 has 2 divisors, whose sum is σ = 311949228. Its totient is φ = 311949226.

The previous prime is 311949217. The next prime is 311949247. The reversal of 311949227 is 722949113.

It is a weak prime.

It is an emirp because it is prime and its reverse (722949113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311949227 - 2⁸ = 311948971 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311949217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155974613 + 155974614.

It is an arithmetic number, because the mean of its divisors is an integer number (155974614).

Almost surely, 2^311949227 is an apocalyptic number.

311949227 is a deficient number, since it is larger than the sum of its proper divisors (1).

311949227 is an equidigital number, since it uses as much as digits as its factorization.

311949227 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 311949227 is about 17662.0844466331. The cubic root of 311949227 is about 678.2054955859.

The spelling of 311949227 in words is "three hundred eleven million, nine hundred forty-nine thousand, two hundred twenty-seven".