318222 has 32 divisors (see below), whose sum is σ = 725760. Its totient is φ = 103320.

The previous prime is 318211. The next prime is 318229. The reversal of 318222 is 222813.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 318195 and 318204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (318229) by changing a digit.

318222 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 15 ways as a sum of consecutive naturals, for example, 3793 + ... + 3875.

It is an arithmetic number, because the mean of its divisors is an integer number (22680).

2³¹⁸²²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 318222, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (362880).

318222 is an abundant number, since it is smaller than the sum of its proper divisors (407538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

318222 is a wasteful number, since it uses less digits than its factorization.

318222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 159 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 318222 is about 564.1116910684. Note that the first 3 decimals coincide. The cubic root of 318222 is about 68.2721217988.

It can be divided in two parts, 3 and 18222, that added together give a square (18225 = 135²).

The spelling of 318222 in words is "three hundred eighteen thousand, two hundred twenty-two".