218168 has 8 divisors (see below), whose sum is σ = 409080. Its totient is φ = 109080.

The previous prime is 218149. The next prime is 218171. The reversal of 218168 is 861812.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13628 + ... + 13643.

It is an arithmetic number, because the mean of its divisors is an integer number (51135).

2²¹⁸¹⁶⁸ is an apocalyptic number.

It is an amenable number.

218168 is a deficient number, since it is larger than the sum of its proper divisors (190912).

218168 is a wasteful number, since it uses less digits than its factorization.

218168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27277 (or 27273 counting only the distinct ones).

The product of its digits is 768, while the sum is 26.

The square root of 218168 is about 467.0845747828. The cubic root of 218168 is about 60.2000728468.

The spelling of 218168 in words is "two hundred eighteen thousand, one hundred sixty-eight".