218159 has 4 divisors (see below), whose sum is σ = 219240. Its totient is φ = 217080.

The previous prime is 218149. The next prime is 218171. The reversal of 218159 is 951812.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 218159 - 2⁴ = 218143 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218149) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137 + ... + 674.

It is an arithmetic number, because the mean of its divisors is an integer number (54810).

2²¹⁸¹⁵⁹ is an apocalyptic number.

218159 is a deficient number, since it is larger than the sum of its proper divisors (1081).

218159 is an equidigital number, since it uses as much as digits as its factorization.

218159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080.

The product of its digits is 720, while the sum is 26.

The square root of 218159 is about 467.0749404539. The cubic root of 218159 is about 60.1992450320.

The spelling of 218159 in words is "two hundred eighteen thousand, one hundred fifty-nine".