218342 has 4 divisors (see below), whose sum is σ = 327516. Its totient is φ = 109170.

The previous prime is 218287. The next prime is 218357. The reversal of 218342 is 243812.

218342 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 218342.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54584 + ... + 54587.

It is an arithmetic number, because the mean of its divisors is an integer number (81879).

2²¹⁸³⁴² is an apocalyptic number.

218342 is a deficient number, since it is larger than the sum of its proper divisors (109174).

218342 is a wasteful number, since it uses less digits than its factorization.

218342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109173.

The product of its digits is 384, while the sum is 20.

The square root of 218342 is about 467.2707994301. The cubic root of 218342 is about 60.2160727936.

The spelling of 218342 in words is "two hundred eighteen thousand, three hundred forty-two".