311275243 has 2 divisors, whose sum is σ = 311275244. Its totient is φ = 311275242.

The previous prime is 311275213. The next prime is 311275249. The reversal of 311275243 is 342572113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311275243 - 2⁹ = 311274731 is a prime.

It is not a weakly prime, because it can be changed into another prime (311275249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155637621 + 155637622.

It is an arithmetic number, because the mean of its divisors is an integer number (155637622).

Almost surely, 2^311275243 is an apocalyptic number.

311275243 is a deficient number, since it is larger than the sum of its proper divisors (1).

311275243 is an equidigital number, since it uses as much as digits as its factorization.

311275243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5040, while the sum is 28.

The square root of 311275243 is about 17642.9941619896. The cubic root of 311275243 is about 677.7167095854.

The spelling of 311275243 in words is "three hundred eleven million, two hundred seventy-five thousand, two hundred forty-three".