311430242144309 has 2 divisors, whose sum is σ = 311430242144310. Its totient is φ = 311430242144308.

The previous prime is 311430242144257. The next prime is 311430242144369. The reversal of 311430242144309 is 903441242034113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 236690378715025 + 74739863429284 = 15384745^2 + 8645222^2 .

It is a cyclic number.

It is not a de Polignac number, because 311430242144309 - 2²⁰ = 311430241095733 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311430242144369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155715121072154 + 155715121072155.

It is an arithmetic number, because the mean of its divisors is an integer number (155715121072155).

Almost surely, 2^{311430242144309} is an apocalyptic number.

It is an amenable number.

311430242144309 is a deficient number, since it is larger than the sum of its proper divisors (1).

311430242144309 is an equidigital number, since it uses as much as digits as its factorization.

311430242144309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 248832, while the sum is 41.

The spelling of 311430242144309 in words is "three hundred eleven trillion, four hundred thirty billion, two hundred forty-two million, one hundred forty-four thousand, three hundred nine".