odd, composite · 591st positive integer
The number 591
591 is an odd composite number. It is the 591st positive integer.
Quick reference
| Prime factorization | 3 × 197 |
| Divisors | 1, 3, 197, 591 |
| Binary | 1001001111 |
| Hexadecimal | 0x24F |
| Roman numeral | DXCI |
| Digit sum | 15 |
| Properties | odd, composite |
Reading 591 in NumGrid context
For 591, the underlying data on this page comes from classical number theory plus NumGrid solver-derived puzzle statistics. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
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 591’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 591 a prime number?
No. 591 is composite. Its prime factorization is 3 × 197.
What are the factors of 591?
The factors (divisors) of 591 are 1, 3, 197, 591.
What is 591 in binary?
591 in binary is 1001001111. In hexadecimal it's 24F.
What is 591 as a Roman numeral?
591 in Roman numerals is DXCI.
What's the digit sum of 591?
Adding the digits of 591: 5 + 9 + 1 = 15.