311385873 has 4 divisors (see below), whose sum is σ = 415181168. Its totient is φ = 207590580.

The previous prime is 311385869. The next prime is 311385887. The reversal of 311385873 is 378583113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 311385873 - 2² = 311385869 is a prime.

It is a super-2 number, since 2×311385873² = 193922323807944258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311385853) 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, 51897643 + ... + 51897648.

It is an arithmetic number, because the mean of its divisors is an integer number (103795292).

Almost surely, 2^311385873 is an apocalyptic number.

It is an amenable number.

311385873 is a deficient number, since it is larger than the sum of its proper divisors (103795295).

311385873 is a wasteful number, since it uses less digits than its factorization.

311385873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103795294.

The product of its digits is 60480, while the sum is 39.

The square root of 311385873 is about 17646.1291222749. The cubic root of 311385873 is about 677.7969889316.

The spelling of 311385873 in words is "three hundred eleven million, three hundred eighty-five thousand, eight hundred seventy-three".