217230 has 32 divisors (see below), whose sum is σ = 562464. Its totient is φ = 53376.

The previous prime is 217229. The next prime is 217241. The reversal of 217230 is 32712.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (17577).

2²¹⁷²³⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281232).

217230 is an abundant number, since it is smaller than the sum of its proper divisors (345234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217230 is a wasteful number, since it uses less digits than its factorization.

217230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580.

The product of its (nonzero) digits is 84, while the sum is 15.

The square root of 217230 is about 466.0793923786. The cubic root of 217230 is about 60.1136733922.

Adding to 217230 its reverse (32712), we get a palindrome (249942).

The spelling of 217230 in words is "two hundred seventeen thousand, two hundred thirty".