Go thank Starfluff for all these facts about the number 100! There are so many I can barely wrap my head around 'em.

100 is a perfect square since 10*10 = 100.
The sum of the first 9 primes is 2 + 3 + 5 + 7 + 11 + 13 + 17 + 19 + 23 = 100.
100 is the sum of four consecutive triangular numbers: 15 + 21 + 28 + 36 = 100.
The proper divisors of 100 are 1, 2, 4, 5, 10, 20, 25, and 50.
The 100th triangular number is 1 + 2 + 3 + ... + 99 + 100 = 5050.
The 100th prime number is 541.
100 is a Harshad Number since it is divisible by the sum of its digits: 100/(1+0+0) = 100. All powers of 10 have this property.
100 is the sum of the first 4 cube numbers: 1 + 8 + 27 + 64 = 100. This is consequence of the fact that 100 is the square of the 4th triangular number, 10.

These facts are so great, they match my 100th Facts & Figures perfectly, thanks so much Starfluff! Also the facts continue in the entered message, there's that many!