odd, prime · 23rd positive integer
The number 23
23 is an odd prime number. It is the 23rd positive integer.
Quick reference
| Prime factorization | 23 (prime) |
| Divisors | 1, 23 |
| Binary | 10111 |
| Hexadecimal | 0x17 |
| Roman numeral | XXIII |
| Digit sum | 5 |
| Properties | odd, prime |
Reading 23 in NumGrid context
23 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 23 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 23 a prime number?
Yes. 23 is prime — its only divisors are 1 and itself.
What are the factors of 23?
The factors (divisors) of 23 are 1, 23.
What is 23 in binary?
23 in binary is 10111. In hexadecimal it's 17.
What is 23 as a Roman numeral?
23 in Roman numerals is XXIII.
What's the digit sum of 23?
Adding the digits of 23: 2 + 3 = 5.