311981173111 has 8 divisors (see below), whose sum is σ = 313355016000. Its totient is φ = 310608967680.

The previous prime is 311981173103. The next prime is 311981173139. The reversal of 311981173111 is 111371189113.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 311981173111 - 2³ = 311981173103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311981173411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26686 + ... + 790363.

It is an arithmetic number, because the mean of its divisors is an integer number (39169377000).

Almost surely, 2^311981173111 is an apocalyptic number.

311981173111 is a deficient number, since it is larger than the sum of its proper divisors (1373842889).

311981173111 is a wasteful number, since it uses less digits than its factorization.

311981173111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818729.

The product of its digits is 4536, while the sum is 37.

The spelling of 311981173111 in words is "three hundred eleven billion, nine hundred eighty-one million, one hundred seventy-three thousand, one hundred eleven".