311116343 has 2 divisors, whose sum is σ = 311116344. Its totient is φ = 311116342.

The previous prime is 311116339. The next prime is 311116349. The reversal of 311116343 is 343611113.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311116343 - 2² = 311116339 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311116349) 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, 155558171 + 155558172.

It is an arithmetic number, because the mean of its divisors is an integer number (155558172).

Almost surely, 2^311116343 is an apocalyptic number.

311116343 is a deficient number, since it is larger than the sum of its proper divisors (1).

311116343 is an equidigital number, since it uses as much as digits as its factorization.

311116343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 311116343 is about 17638.4903832499. The cubic root of 311116343 is about 677.6013695263.

Adding to 311116343 its reverse (343611113), we get a palindrome (654727456).

The spelling of 311116343 in words is "three hundred eleven million, one hundred sixteen thousand, three hundred forty-three".