What is the HCF (highest common factor) of $57$ and $513$?

To find the Highest Common Factor (HCF) of $57$ and $513$, we check if the larger number is completely divisible by the smaller number.Let us perform the division of $513$ by $57$:
$$\frac{513}{57}=9$$
Since $513$ is exactly divisible by $57$ with a remainder of $0$, $57$ is a factor of $513$.Thus, the Highest Common Factor (HCF) of $57$ and $513$ is $57$.