You can learn a lot just by looking at one number at a time, especially when you use Richard Phillips “numbers” website.
Phillips looks at each day of the month and gives facts for each number – for instance, the number two is a prime number, the third number in the Fibonacci sequence, and is the basis for sayings such as “two is company, three is a crowd.” He includes card games that involve numbers, as well as holidays, numbers in different languages, and music that involves the digit.
For more numbers than 31, Phillips’ book Numbers: facts, figures and fiction can provide you with more integers than the website.