Why is $2$ the only even prime number?

2 the only even prime number.

• A prime number is an integer that is only divisible by itself and 1.
• The factors of $2$ are $1$ and $2$.
• Other than $2$ every even number is divisible by $2$, $1$ and number itself so the number will have more than two factors.

Hence, from the above explanation $2$ is the only even prime number.