218073 has 8 divisors (see below), whose sum is σ = 293248. Its totient is φ = 144144.

The previous prime is 218069. The next prime is 218077. The reversal of 218073 is 370812.

It is an interprime number because it is at equal distance from previous prime (218069) and next prime (218077).

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

It is not a de Polignac number, because 218073 - 2² = 218069 is a prime.

It is a Duffinian number.

It is a Curzon number.

218073 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (218077) 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, 240 + ... + 702.

It is an arithmetic number, because the mean of its divisors is an integer number (36656).

2²¹⁸⁰⁷³ is an apocalyptic number.

It is an amenable number.

218073 is a deficient number, since it is larger than the sum of its proper divisors (75175).

218073 is a wasteful number, since it uses less digits than its factorization.

218073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 623.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 218073 is about 466.9828690648. The cubic root of 218073 is about 60.1913336531.

Adding to 218073 its reverse (370812), we get a palindrome (588885).

The spelling of 218073 in words is "two hundred eighteen thousand, seventy-three".