218901 has 8 divisors (see below), whose sum is σ = 294624. Its totient is φ = 144560.

The previous prime is 218887. The next prime is 218923. The reversal of 218901 is 109812.

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 218901 - 2⁹ = 218389 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115 + ... + 671.

It is an arithmetic number, because the mean of its divisors is an integer number (36828).

2²¹⁸⁹⁰¹ is an apocalyptic number.

It is an amenable number.

218901 is a deficient number, since it is larger than the sum of its proper divisors (75723).

218901 is a wasteful number, since it uses less digits than its factorization.

218901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 218901 is about 467.8685712890. The cubic root of 218901 is about 60.2674174720.

The spelling of 218901 in words is "two hundred eighteen thousand, nine hundred one".