311440332242309 has 2 divisors, whose sum is σ = 311440332242310. Its totient is φ = 311440332242308.

The previous prime is 311440332242287. The next prime is 311440332242381. The reversal of 311440332242309 is 903242233044113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 207024184072225 + 104416148170084 = 14388335^2 + 10218422^2 .

It is an emirp because it is prime and its reverse (903242233044113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311440332242309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311440332242209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155720166121154 + 155720166121155.

It is an arithmetic number, because the mean of its divisors is an integer number (155720166121155).

Almost surely, 2^{311440332242309} is an apocalyptic number.

It is an amenable number.

311440332242309 is a deficient number, since it is larger than the sum of its proper divisors (1).

311440332242309 is an equidigital number, since it uses as much as digits as its factorization.

311440332242309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 373248, while the sum is 41.

The spelling of 311440332242309 in words is "three hundred eleven trillion, four hundred forty billion, three hundred thirty-two million, two hundred forty-two thousand, three hundred nine".