218030 has 8 divisors (see below), whose sum is σ = 392472. Its totient is φ = 87208.

The previous prime is 218021. The next prime is 218047. The reversal of 218030 is 30812.

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

It is an Ulam number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 217996 and 218014.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10892 + ... + 10911.

It is an arithmetic number, because the mean of its divisors is an integer number (49059).

2²¹⁸⁰³⁰ is an apocalyptic number.

218030 is a deficient number, since it is larger than the sum of its proper divisors (174442).

218030 is a wasteful number, since it uses less digits than its factorization.

218030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21810.

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

The square root of 218030 is about 466.9368265622. The cubic root of 218030 is about 60.1873771837.

Adding to 218030 its reverse (30812), we get a palindrome (248842).

The spelling of 218030 in words is "two hundred eighteen thousand, thirty".