50 Cent just made a massive donation to charity ... and the funds are all thanks to the unloading of his mega-mansion in Connecticut.

50 Cent just sold his 50,000 square foot pad -- with a whopping 21 bedrooms and 25 bathrooms -- for $3 million. A source close to the rapper tells us every penny from the sale will be donated to 50's G-Unity Foundation ... a project that provides grants to non-profit organizations that focus on improving the quality of life for low-income and underserved communities across the country. 

50 Cent has been trying to sell the massive property for years ... he bought it way back in 2007 for $18.5 million. The baller pad is palatial ... with 9 kitchens, outdoor infinity pool and grotto, indoor pool, helicopter pad, casino, nightclub, basketball courts and a pond!!! 

Props to 50 Cent for putting the money to good use.

https://www.tmz.com/2019/04/01/50-cent-sells-connecticut-mansion-donate-money-charity/