311318 has 16 divisors (see below), whose sum is σ = 549024. Its totient is φ = 129600.

The previous prime is 311303. The next prime is 311323. The reversal of 311318 is 813113.

311318 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 311296 and 311305.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 311318.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218 + ... + 818.

It is an arithmetic number, because the mean of its divisors is an integer number (34314).

2³¹¹³¹⁸ is an apocalyptic number.

311318 is a deficient number, since it is larger than the sum of its proper divisors (237706).

311318 is a wasteful number, since it uses less digits than its factorization.

311318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647.

The product of its digits is 72, while the sum is 17.

The square root of 311318 is about 557.9587798395. The cubic root of 311318 is about 67.7747738723.

The spelling of 311318 in words is "three hundred eleven thousand, three hundred eighteen".