311449440919 has 2 divisors, whose sum is σ = 311449440920. Its totient is φ = 311449440918.

The previous prime is 311449440901. The next prime is 311449440947. The reversal of 311449440919 is 919044944113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311449440919 - 2¹³ = 311449432727 is a prime.

It is a super-2 number, since 2×311449440919² (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 (311449440319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155724720459 + 155724720460.

It is an arithmetic number, because the mean of its divisors is an integer number (155724720460).

Almost surely, 2^311449440919 is an apocalyptic number.

311449440919 is a deficient number, since it is larger than the sum of its proper divisors (1).

311449440919 is an equidigital number, since it uses as much as digits as its factorization.

311449440919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 559872, while the sum is 49.

The spelling of 311449440919 in words is "three hundred eleven billion, four hundred forty-nine million, four hundred forty thousand, nine hundred nineteen".