Huh. I was at the same showing and didn't care for it much. The movie only rarely touched on the mathematics and instead focused on his life and personal troubles. At least Theory of Everything and Imitation Game actually showed a bit of work happening. The closest we get in this movie is a bit of argument about primes and then a little of his partitions work (at an extremely consumable level, so much so it was boring). I kept thinking "Hmm, I wonder why they felt hiding mathematics and making it a personal biopic was better than getting people interested in the actual math?".

In my opinion, Carl Sagan's books remain a much better "popular interest in X" method. Explain things to people, sometimes slowly or incompletely, but avoid the hero worship.