This number is a composite.
The smallest run of 3 consecutive integers that are semi-primes (the product of two primes) begins with 33. [Wells]
The smallest triadic semiprime. [Capelle]
The largest known number (coincidentally semiprime) that is not the sum of two semiprimes. [Capelle]
The smallest odd number n such that n+x! is not a prime, for any number x. [Loungrides]
The sum of the digits of the first (3+3) primes with a digit-3 equals 33. Note that π(33) = π(3*π(33)). [Worrom]