odd, composite · 217th positive integer
The number 217
217 is an odd composite number. It is the 217th positive integer.
Quick reference
| Prime factorization | 7 × 31 |
| Divisors | 1, 7, 31, 217 |
| Binary | 11011001 |
| Hexadecimal | 0xD9 |
| Roman numeral | CCXVII |
| Digit sum | 10 |
| Properties | odd, composite |
Reading 217 in NumGrid context
217 is one of the data points covered by this site’s integer properties and number-guessing puzzles dataset. The detail above comes directly from classical number theory plus NumGrid solver-derived puzzle statistics; the context that follows situates the headline numbers against the broader distribution across positive integers within the NumGrid target pool.
The methodology behind every numeric value on this page is publicly documented on the classical number theory plus NumGrid solver-derived puzzle statistics portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for 217 is typically a peer within positive integers within the NumGrid target pool with similar size, similar exposure, or similar geography — not the national-level summary alone.
Frequently asked
Is 217 a prime number?
No. 217 is composite. Its prime factorization is 7 × 31.
What are the factors of 217?
The factors (divisors) of 217 are 1, 7, 31, 217.
What is 217 in binary?
217 in binary is 11011001. In hexadecimal it's D9.
What is 217 as a Roman numeral?
217 in Roman numerals is CCXVII.
What's the digit sum of 217?
Adding the digits of 217: 2 + 1 + 7 = 10.