# Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

## Unique Properties of 33

- 33 is the largest number that is not a sum of distinct triangular numbers
- 33 is the smallest 2-digit palindrome which is also palindromic in binary (submitted by Andy Edwards)
- The smallest run of 3 consecutive integers that are semi-primes (the product of two primes) begins with 33
- 33 is the largest positive integer that can not be expressed as a sum of different triangular numbers