33

is the integer between.

Math features
3, 33, 333, ... In fact, there is no prime number except 3 in this sequence as all are multiples of 3.
 * 33 is an odd number.
 * 33 is a deficient number.
 * 33 is a semiprime, being 3 &times; 11.
 * 33 is a palindromic number in binary and decimal.
 * 33% ≈ $$\frac{1}{3}$$.
 * 33 is the first composite number in the sequence:
 * 33 is the first natural number to have six letters in its Roman numeral. The next number to have six letters is 37.