311314243 has 2 divisors, whose sum is σ = 311314244. Its totient is φ = 311314242.

The previous prime is 311314187. The next prime is 311314249. The reversal of 311314243 is 342413113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311314243 is a prime.

It is not a weakly prime, because it can be changed into another prime (311314249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155657121 + 155657122.

It is an arithmetic number, because the mean of its divisors is an integer number (155657122).

Almost surely, 2^311314243 is an apocalyptic number.

311314243 is a deficient number, since it is larger than the sum of its proper divisors (1).

311314243 is an equidigital number, since it uses as much as digits as its factorization.

311314243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 22.

The square root of 311314243 is about 17644.0993819464. The cubic root of 311314243 is about 677.7450123480.

Adding to 311314243 its reverse (342413113), we get a palindrome (653727356).

The spelling of 311314243 in words is "three hundred eleven million, three hundred fourteen thousand, two hundred forty-three".