it referst to the ASCII code, meaning that this number represents a sign/letter/character.
In Bender's appartment's case this is the "$" sign. Quite obvious why this is significant to him.
A lot of people here can answer this easily, and if they can't out of their head all they need to do is search.
you might have a look into the General Disscussion board, there is already a trivi quiz like that.
also, welcome to PEEL S2soup
if you need any help on how to behave here, or how to post with codes, what some special abreviations here mean and so on... you might want to take a look into the PEELers' FAQ
. It's quite handy to read.
Enjoy your stay here.