218341 has 4 divisors (see below), whose sum is σ = 225900. Its totient is φ = 210784.

The previous prime is 218287. The next prime is 218357. The reversal of 218341 is 143812.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93025 + 125316 = 305^2 + 354^2 .

It is a cyclic number.

It is not a de Polignac number, because 218341 - 2⁷ = 218213 is a prime.

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

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218371) 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, 3736 + ... + 3793.

It is an arithmetic number, because the mean of its divisors is an integer number (56475).

2²¹⁸³⁴¹ is an apocalyptic number.

It is an amenable number.

218341 is a deficient number, since it is larger than the sum of its proper divisors (7559).

218341 is an equidigital number, since it uses as much as digits as its factorization.

218341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7558.

The product of its digits is 192, while the sum is 19.

The square root of 218341 is about 467.2697293855. The cubic root of 218341 is about 60.2159808642.

Subtracting from 218341 its reverse (143812), we obtain a square (74529 = 273²).

The spelling of 218341 in words is "two hundred eighteen thousand, three hundred forty-one".