>>53437071CP is a made up number based on level x stat totals. The curved line above your mon shows approximately what level it is on a scale of 1 - 50, and it costs more stardust to upgrade at higher levels. High IV pokemon will be stronger than low IV pokemon at the same level, but high level pokemon don't need as much stardust to get to that level because they're already near that goal level. Unless you're minmaxing for PvP or have a lot of equivalent level pokemon to choose from, IVs aren't that important.
