How much would youtube pay you for 500000 views?

This varies by user as YouTube offers different pay-per-view options depending on the user's popularity among various other factors. Also, the 500,000 views won't earn you anything if you don't have monetization enabled or if you're not eligible for monetization. There's just too many factors to give you an exact answer on how much 500,000 views would be worth. (But my guess is that it's enough to get a big pay day from google).