odd, prime · 523rd positive integer
The number 523
523 is an odd prime number. It is the 523rd positive integer.
Quick reference
| Prime factorization | 523 (prime) |
| Divisors | 1, 523 |
| Binary | 1000001011 |
| Hexadecimal | 0x20B |
| Roman numeral | DXXIII |
| Digit sum | 10 |
| Properties | odd, prime |
Reading 523 in NumGrid context
523 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.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 523’s peers within positive integers within the NumGrid target pool. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Frequently asked
Is 523 a prime number?
Yes. 523 is prime — its only divisors are 1 and itself.
What are the factors of 523?
The factors (divisors) of 523 are 1, 523.
What is 523 in binary?
523 in binary is 1000001011. In hexadecimal it's 20B.
What is 523 as a Roman numeral?
523 in Roman numerals is DXXIII.
What's the digit sum of 523?
Adding the digits of 523: 5 + 2 + 3 = 10.