Originally Posted by Socks keep you warm
This is really sounding more like a laptop.
In which case the temps are fine, laptops always run hot.
(Don't leave laptops on surfaces for prolonged periods of time, linen etc...)
My laptops never run hotter than 40C ( 104F, ambient this time of year is 90F.. so only 14F higher, not bad ) on light games such as Runescape or general web browsing. All of them, be it my Macbooks, Alienwares, Latitudes, Toughbooks, and a few Sagers, all run in the same general area with such light loads, some are running on onboard video and some with more discrete options both AMD and Nvidia, doesn't matter with such light loads.
Doing a quick google for "Asus N53SV overheating" and it seems a good portion of the N series laptops from Asus have overheating issues, and lot of search results with that particular model as well. I would suggest, since you said you just bought it I'm going to assume retail, that you return it and find a different laptop as it seems that line of them all have overheating and fan problems.
If you don't have the option of returning it for whatever reason and don't mind voiding the warranty if there is one ( on the assumption you got it second hand ), then you could take it apart and replace the thermal paste and thermal pads to see if you can yield better results.