odd, prime · 557th positive integer
The number 557
557 is an odd prime number. It is the 557th positive integer.
Quick reference
| Prime factorization | 557 (prime) |
| Divisors | 1, 557 |
| Binary | 1000101101 |
| Hexadecimal | 0x22D |
| Roman numeral | DLVII |
| Digit sum | 17 |
| Properties | odd, prime |
Reading 557 in NumGrid context
557 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 557’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 557 a prime number?
Yes. 557 is prime — its only divisors are 1 and itself.
What are the factors of 557?
The factors (divisors) of 557 are 1, 557.
What is 557 in binary?
557 in binary is 1000101101. In hexadecimal it's 22D.
What is 557 as a Roman numeral?
557 in Roman numerals is DLVII.
What's the digit sum of 557?
Adding the digits of 557: 5 + 5 + 7 = 17.