>>272394523
You can use slic3r to try it out to see if it'll print. https://slic3r.org/
If you want to check/fix the mesh you can check out meshlab which is capable of checking your mesh for errors. It's got a learning curve to it though. 
http://www.meshlab.net/

I bet there are blender addons as well but I don't know enough about them to give any advice.