218007 has 6 divisors (see below), whose sum is σ = 314912. Its totient is φ = 145332.

The previous prime is 218003. The next prime is 218021. The reversal of 218007 is 700812.

It is not a de Polignac number, because 218007 - 2² = 218003 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218003) 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 5 ways as a sum of consecutive naturals, for example, 12103 + ... + 12120.

2²¹⁸⁰⁰⁷ is an apocalyptic number.

218007 is a deficient number, since it is larger than the sum of its proper divisors (96905).

218007 is a wasteful number, since it uses less digits than its factorization.

218007 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24229 (or 24226 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 18.

The square root of 218007 is about 466.9121973134. The cubic root of 218007 is about 60.1852607190.

Adding to 218007 its reverse (700812), we get a palindrome (918819).

The spelling of 218007 in words is "two hundred eighteen thousand, seven".