218601 has 12 divisors (see below), whose sum is σ = 320112. Its totient is φ = 143736.

The previous prime is 218599. The next prime is 218611. The reversal of 218601 is 106812.

It is not a de Polignac number, because 218601 - 2¹ = 218599 is a prime.

It is not an unprimeable number, because it can be changed into a prime (218611) 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 11 ways as a sum of consecutive naturals, for example, 850 + ... + 1076.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2²¹⁸⁶⁰¹ is an apocalyptic number.

It is an amenable number.

218601 is a deficient number, since it is larger than the sum of its proper divisors (101511).

218601 is a wasteful number, since it uses less digits than its factorization.

218601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 337 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 218601 is about 467.5478585129. The cubic root of 218601 is about 60.2398730705.

The spelling of 218601 in words is "two hundred eighteen thousand, six hundred one".