311728389167 has 4 divisors (see below), whose sum is σ = 335707496040. Its totient is φ = 287749282296.

The previous prime is 311728389151. The next prime is 311728389169. The reversal of 311728389167 is 761983827113.

It is a happy number.

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 311728389167 - 2⁴ = 311728389151 is a prime.

It is a super-2 number, since 2×311728389167² (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 (311728389169) 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, 11989553417 + ... + 11989553442.

It is an arithmetic number, because the mean of its divisors is an integer number (83926874010).

Almost surely, 2^311728389167 is an apocalyptic number.

311728389167 is a deficient number, since it is larger than the sum of its proper divisors (23979106873).

311728389167 is a wasteful number, since it uses less digits than its factorization.

311728389167 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23979106872.

The product of its digits is 3048192, while the sum is 56.

The spelling of 311728389167 in words is "three hundred eleven billion, seven hundred twenty-eight million, three hundred eighty-nine thousand, one hundred sixty-seven".