30218 has 8 divisors (see below), whose sum is σ = 46980. Its totient is φ = 14560.

The previous prime is 30211. The next prime is 30223. The reversal of 30218 is 81203.

It can be written as a sum of positive squares in 2 ways, for example, as 29929 + 289 = 173^2 + 17^2 .

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

It is not an unprimeable number, because it can be changed into a prime (30211) by changing a digit.

30218 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203 + ... + 318.

2³⁰²¹⁸ is an apocalyptic number.

30218 is a deficient number, since it is larger than the sum of its proper divisors (16762).

30218 is a wasteful number, since it uses less digits than its factorization.

30218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 30218 is about 173.8332534356. The cubic root of 30218 is about 31.1474075619.

The spelling of 30218 in words is "thirty thousand, two hundred eighteen".