318218 has 8 divisors (see below), whose sum is σ = 482112. Its totient is φ = 157516.

The previous prime is 318211. The next prime is 318229. The reversal of 318218 is 812813.

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

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 318193 and 318202.

It is not an unprimeable number, because it can be changed into a prime (318211) by changing a digit.

318218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 530 + ... + 957.

It is an arithmetic number, because the mean of its divisors is an integer number (60264).

2³¹⁸²¹⁸ is an apocalyptic number.

318218 is a deficient number, since it is larger than the sum of its proper divisors (163894).

318218 is a wasteful number, since it uses less digits than its factorization.

318218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1596.

The product of its digits is 384, while the sum is 23.

The square root of 318218 is about 564.1081456600. The cubic root of 318218 is about 68.2718357411.

The spelling of 318218 in words is "three hundred eighteen thousand, two hundred eighteen".