odd, prime · 311th positive integer
The number 311
311 is an odd prime number. It is the 311th positive integer.
Quick reference
| Prime factorization | 311 (prime) |
| Divisors | 1, 311 |
| Binary | 100110111 |
| Hexadecimal | 0x137 |
| Roman numeral | CCCXI |
| Digit sum | 5 |
| Properties | odd, prime |
Reading 311 in NumGrid context
For 311, 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.
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 311 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 311 a prime number?
Yes. 311 is prime — its only divisors are 1 and itself.
What are the factors of 311?
The factors (divisors) of 311 are 1, 311.
What is 311 in binary?
311 in binary is 100110111. In hexadecimal it's 137.
What is 311 as a Roman numeral?
311 in Roman numerals is CCCXI.
What's the digit sum of 311?
Adding the digits of 311: 3 + 1 + 1 = 5.