218207 has 8 divisors (see below), whose sum is σ = 241920. Its totient is φ = 195160.

The previous prime is 218191. The next prime is 218213. The reversal of 218207 is 702812.

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

It is a cyclic number.

It is not a de Polignac number, because 218207 - 2⁴ = 218191 is a prime.

It is a super-2 number, since 2×218207² = 95228589698, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218227) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 794 + ... + 1032.

It is an arithmetic number, because the mean of its divisors is an integer number (30240).

2²¹⁸²⁰⁷ is an apocalyptic number.

218207 is a deficient number, since it is larger than the sum of its proper divisors (23713).

218207 is a wasteful number, since it uses less digits than its factorization.

218207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 218207 is about 467.1263212451. The cubic root of 218207 is about 60.2036597813.

It can be divided in two parts, 21 and 8207, that added together give a palindrome (8228).

The spelling of 218207 in words is "two hundred eighteen thousand, two hundred seven".