311277457919 has 4 divisors (see below), whose sum is σ = 327660482040. Its totient is φ = 294894433800.

The previous prime is 311277457877. The next prime is 311277457927. The reversal of 311277457919 is 919754772113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311277457919 is a prime.

It is a super-2 number, since 2×311277457919² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311277457949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8191512032 + ... + 8191512069.

It is an arithmetic number, because the mean of its divisors is an integer number (81915120510).

Almost surely, 2^311277457919 is an apocalyptic number.

311277457919 is a deficient number, since it is larger than the sum of its proper divisors (16383024121).

311277457919 is a wasteful number, since it uses less digits than its factorization.

311277457919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16383024120.

The product of its digits is 3333960, while the sum is 56.

The spelling of 311277457919 in words is "three hundred eleven billion, two hundred seventy-seven million, four hundred fifty-seven thousand, nine hundred nineteen".