Here is an interesting sight for all those people like numbers and have interest in them beyond the usual and ordinary every day interaction that we all have with numbers. The site claims that a user can enter any number, up to 9999, and the site will tell every bit of information that is related to the number known to man.
Beyond 9999, there is no number gossip collected by the site maker. It will tell you such things as rare and common properties of the number as well as unique properties. For some numbers there will be other mathematical facts related to them. For example, 100 is the first number lexicographically if written in Roman numerals.
Hence, the site is indeed very interesting a must-visit for mathematics and number buffs. But it should not be confused with numerology, which is entirely different branch of predictive and speculative science. One word of caution is that not everything said here about numbers, especially of mystic nature is true.