218330 has 16 divisors (see below), whose sum is σ = 449280. Its totient is φ = 74832.

The previous prime is 218287. The next prime is 218357. The reversal of 218330 is 33812.

218330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 218299 and 218308.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1490 + ... + 1629.

It is an arithmetic number, because the mean of its divisors is an integer number (28080).

2²¹⁸³³⁰ is an apocalyptic number.

218330 is an abundant number, since it is smaller than the sum of its proper divisors (230950).

It is a weird number, because it is abundant, but not a pseudoperfect number.

218330 is a wasteful number, since it uses less digits than its factorization.

218330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3133.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 218330 is about 467.2579587337. The cubic root of 218330 is about 60.2149696219.

The spelling of 218330 in words is "two hundred eighteen thousand, three hundred thirty".