318311 has 8 divisors (see below), whose sum is σ = 373920. Its totient is φ = 265248.

The previous prime is 318301. The next prime is 318313. The reversal of 318311 is 113813.

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 318311 - 2⁶ = 318247 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 318311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318313) 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, 356 + ... + 873.

It is an arithmetic number, because the mean of its divisors is an integer number (46740).

2³¹⁸³¹¹ is an apocalyptic number.

318311 is a deficient number, since it is larger than the sum of its proper divisors (55609).

318311 is a wasteful number, since it uses less digits than its factorization.

318311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1273.

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

The square root of 318311 is about 564.1905706408. The cubic root of 318311 is about 68.2784859644.

The spelling of 318311 in words is "three hundred eighteen thousand, three hundred eleven".