odd, composite · 243rd positive integer
The number 243
243 is an odd composite number. It is the 243rd positive integer.
Quick reference
| Prime factorization | 3 × 3 × 3 × 3 × 3 |
| Divisors | 1, 3, 9, 27, 81, 243 |
| Binary | 11110011 |
| Hexadecimal | 0xF3 |
| Roman numeral | CCXLIII |
| Digit sum | 9 |
| Properties | odd, composite |
Reading 243 in NumGrid context
243 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.
Every number on this page links back to classical number theory plus NumGrid solver-derived puzzle statistics; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
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 243 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 243 a prime number?
No. 243 is composite. Its prime factorization is 3 × 3 × 3 × 3 × 3.
What are the factors of 243?
The factors (divisors) of 243 are 1, 3, 9, 27, 81, 243.
What is 243 in binary?
243 in binary is 11110011. In hexadecimal it's F3.
What is 243 as a Roman numeral?
243 in Roman numerals is CCXLIII.
What's the digit sum of 243?
Adding the digits of 243: 2 + 4 + 3 = 9.