318224 has 10 divisors (see below), whose sum is σ = 616590. Its totient is φ = 159104.

The previous prime is 318211. The next prime is 318229. The reversal of 318224 is 422813.

It can be written as a sum of positive squares in only one way, i.e., 313600 + 4624 = 560^2 + 68^2 .

It is a junction number, because it is equal to n+sod(n) for n = 318196 and 318205.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 318224.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9929 + ... + 9960.

It is an arithmetic number, because the mean of its divisors is an integer number (61659).

2³¹⁸²²⁴ is an apocalyptic number.

It is an amenable number.

318224 is a deficient number, since it is larger than the sum of its proper divisors (298366).

318224 is a wasteful number, since it uses less digits than its factorization.

318224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19897 (or 19891 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 318224 is about 564.1134637642. The cubic root of 318224 is about 68.2722648268.

The spelling of 318224 in words is "three hundred eighteen thousand, two hundred twenty-four".