218241 has 16 divisors (see below), whose sum is σ = 331200. Its totient is φ = 141984.

The previous prime is 218233. The next prime is 218249. The reversal of 218241 is 142812.

It is an interprime number because it is at equal distance from previous prime (218233) and next prime (218249).

It is not a de Polignac number, because 218241 - 2³ = 218233 is a prime.

It is a Curzon number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218241.

It is not an unprimeable number, because it can be changed into a prime (218249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1525 + ... + 1661.

It is an arithmetic number, because the mean of its divisors is an integer number (20700).

2²¹⁸²⁴¹ is an apocalyptic number.

It is an amenable number.

218241 is a deficient number, since it is larger than the sum of its proper divisors (112959).

218241 is a wasteful number, since it uses less digits than its factorization.

218241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205 (or 199 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 218241 is about 467.1627125531. The cubic root of 218241 is about 60.2067865036.

The spelling of 218241 in words is "two hundred eighteen thousand, two hundred forty-one".