204217 has 8 divisors (see below), whose sum is σ = 229824. Its totient is φ = 180048.

The previous prime is 204173. The next prime is 204233. The reversal of 204217 is 712402.

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 204217 - 2¹⁵ = 171449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 204217.

It is not an unprimeable number, because it can be changed into a prime (204517) 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 7 ways as a sum of consecutive naturals, for example, 43 + ... + 640.

It is an arithmetic number, because the mean of its divisors is an integer number (28728).

2²⁰⁴²¹⁷ is an apocalyptic number.

It is an amenable number.

204217 is a deficient number, since it is larger than the sum of its proper divisors (25607).

204217 is a wasteful number, since it uses less digits than its factorization.

204217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 204217 is about 451.9037508143. The cubic root of 204217 is about 58.8885187799. Note that the first 3 decimals are identical.

Adding to 204217 its reverse (712402), we get a palindrome (916619).

The spelling of 204217 in words is "two hundred four thousand, two hundred seventeen", and thus it is an iban number.