Data Center Heat Reuse

I am an electrical intern, so still new. I'm helping with a space that is being remodeled to a small data center room (around 50 racks). I am really surprised by the sheer amount of heat that has to be removed from the space given how small of a space it is. I'm also surprised by how profitable such a small space could be as a data center given what I heard.

This led me to thinking about other buildings and potential locations of data centers. If that much heat is being used, could it be channeled/used in combination with another system? One idea would be for a large scale residential building like apartments, could you design it so the heat would circulate and heat the building? If the data center is in the basement could it be used like geothermal energy? Could you loop the air or duct it to areas under sidewalks to keep them warm enough to prevent snow or ice from building up? If there was one built near a power plant, could new water run through the space to cool the data center and then be dumped into the power plant as preheated water to boil?

I'm curious if anything like this has merits or if the mixing of spaces would just cause too many issues. For example would there need to be a lot of redundant systems should the data center not be in operation or if there would be so many code issues that it would not make sense.