odd, prime · 157th positive integer
The number 157
157 is an odd prime number. It is the 157th positive integer.
Quick reference
| Prime factorization | 157 (prime) |
| Divisors | 1, 157 |
| Binary | 10011101 |
| Hexadecimal | 0x9D |
| Roman numeral | CLVII |
| Digit sum | 13 |
| Properties | odd, prime |
Reading 157 in NumGrid context
The 157 record above pulls directly from classical number theory plus NumGrid solver-derived puzzle statistics. What follows is the per-entity context — how 157 sits in the broader integer properties and number-guessing puzzles distribution and which underlying factors drive the headline numbers.
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.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for 157’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 157 a prime number?
Yes. 157 is prime — its only divisors are 1 and itself.
What are the factors of 157?
The factors (divisors) of 157 are 1, 157.
What is 157 in binary?
157 in binary is 10011101. In hexadecimal it's 9D.
What is 157 as a Roman numeral?
157 in Roman numerals is CLVII.
What's the digit sum of 157?
Adding the digits of 157: 1 + 5 + 7 = 13.