odd, composite · 213th positive integer
The number 213
213 is an odd composite number. It is the 213th positive integer.
Quick reference
| Prime factorization | 3 × 71 |
| Divisors | 1, 3, 71, 213 |
| Binary | 11010101 |
| Hexadecimal | 0xD5 |
| Roman numeral | CCXIII |
| Digit sum | 6 |
| Properties | odd, composite |
Reading 213 in NumGrid context
The 213 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 213 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
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 213 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 213 a prime number?
No. 213 is composite. Its prime factorization is 3 × 71.
What are the factors of 213?
The factors (divisors) of 213 are 1, 3, 71, 213.
What is 213 in binary?
213 in binary is 11010101. In hexadecimal it's D5.
What is 213 as a Roman numeral?
213 in Roman numerals is CCXIII.
What's the digit sum of 213?
Adding the digits of 213: 2 + 1 + 3 = 6.