318216 has 16 divisors (see below), whose sum is σ = 795600. Its totient is φ = 106064.

The previous prime is 318211. The next prime is 318229. The reversal of 318216 is 612813.

318216 is nontrivially palindromic in base 15.

It is a super-2 number, since 2×318216² = 202522845312, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 318192 and 318201.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6606 + ... + 6653.

It is an arithmetic number, because the mean of its divisors is an integer number (49725).

2³¹⁸²¹⁶ is an apocalyptic number.

It is an amenable number.

318216 is an abundant number, since it is smaller than the sum of its proper divisors (477384).

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

318216 is a wasteful number, since it uses less digits than its factorization.

318216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13268 (or 13264 counting only the distinct ones).

The product of its digits is 288, while the sum is 21.

The square root of 318216 is about 564.1063729475. The cubic root of 318216 is about 68.2716927113.

The spelling of 318216 in words is "three hundred eighteen thousand, two hundred sixteen".