311377281199 has 4 divisors (see below), whose sum is σ = 311487039864. Its totient is φ = 311267522536.

The previous prime is 311377281197. The next prime is 311377281211. The reversal of 311377281199 is 991182773113.

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

It is a cyclic number.

It is not a de Polignac number, because 311377281199 - 2¹ = 311377281197 is a prime.

It is a super-2 number, since 2×311377281199² (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 (311377281191) 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, 54875077 + ... + 54880750.

It is an arithmetic number, because the mean of its divisors is an integer number (77871759966).

Almost surely, 2^311377281199 is an apocalyptic number.

311377281199 is a deficient number, since it is larger than the sum of its proper divisors (109758665).

311377281199 is a wasteful number, since it uses less digits than its factorization.

311377281199 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109758664.

The product of its digits is 571536, while the sum is 52.

The spelling of 311377281199 in words is "three hundred eleven billion, three hundred seventy-seven million, two hundred eighty-one thousand, one hundred ninety-nine".