Explore fascinating divisibility tricks in this engaging 28-minute video featuring Professor Tony Padilla. Discover quick and clever methods for determining divisibility by various numbers, enhancing your mental math skills and deepening your understanding of number theory. Learn about the intriguing Belphegor's Prime and gain insights into the mathematical principles behind these tricks. Delve into the world of numbers with Numberphile, supported by the Mathematical Sciences Research Institute and Science Sandbox, as you uncover the beauty and logic behind divisibility rules.