[parennoob]

Your argument is correct, but you seem to place quite a lot of trust in Census numbers. As someone who has seen some of the actual Census surveys out in the country, that is rather amusing. Making population numbers up, or roughly estimating them is quite common.

Now your structures argument makes sense, so I'm guessing this is more like 600-700 people (most Indian families live in large joint households, so 6 people a house is not uncommon).