33 is a composite number. A composite number is a positive integer that has at least one positive divisor other than one and itself. In the case of 33, it can be divided evenly by 1, 3, 11, and 33. Since it has divisors other than 1 and itself, it is not a prime number.
Prime numbers are numbers greater than 1 that have no positive divisors other than 1 and themselves. Examples of prime numbers include 2, 3, 5, 7, 11, and so on. Since 33 does not meet this criterion, it is classified as a composite number.