You should be able to find printf on the Net somewhere. Basically %i is for ints, whereas %d is for "decimal" (I think normally short ints). Probably %d would have worked - not that you had that.
Also, will that also show the colons on my POV display if I am able to see them in the Serial monitor?
If you font has them it should (and the font appears to have them). Just take them out if you don't want them.