311309419919 has 2 divisors, whose sum is σ = 311309419920. Its totient is φ = 311309419918.

The previous prime is 311309419901. The next prime is 311309419931. The reversal of 311309419919 is 919914903113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311309419919 is a prime.

It is a super-2 number, since 2×311309419919² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311309419969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155654709959 + 155654709960.

It is an arithmetic number, because the mean of its divisors is an integer number (155654709960).

Almost surely, 2^311309419919 is an apocalyptic number.

311309419919 is a deficient number, since it is larger than the sum of its proper divisors (1).

311309419919 is an equidigital number, since it uses as much as digits as its factorization.

311309419919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 50.

The spelling of 311309419919 in words is "three hundred eleven billion, three hundred nine million, four hundred nineteen thousand, nine hundred nineteen".