Home > 220 (number)

1 Mathematics

It is a composite number, with its divisors being 2, 4, 5, 10, 11, 20, 22, 44, 55 and 110, making it an amicable number with two hundred eighty-four. Also, being divisible by the sum of its digits, 220 is a Harshad number.

It is the sum of four consecutive primes (47 + 53 + 59 + 61).

It is a tetrahedral number, the sum of the first ten triangular numbers.

2 Other fields

220 is:

• A common voltage in the United States and CanadaCanada historically the Dominion of Canada is the second-largest, and northernmost, country in the world. It is a decentralized federation of 10 provinces and 3 territories, governed as a constitutional monarchy, and formed in 1867 through an act of Confe.
• In the Holy Bible, the number of goats Jacob gave to his brother Esau ("two hundred she-goats and twenty he-goats") and the number of rams ("two hundred ewes and twenty rams," Genesis 32:14).
• An SMTPSimple Mail Transfer Protocol SMTP is the de facto standard for email transmission across the Internet. SMTP is a relatively simple, text-based protocol, where one or more recipients of a message are specified (and in most cases verified to exist) and the code meaning "service ready"
• A film format for medium format cameras (see 120 film120 is a film format for still photography introduced by Kodak for their Brownie No. 2 in 1901, and still very popular, as the surviving medium format. The 120 film allows several image formats, the most common being the 6 × 6 cm (120 square format), or m).
• The designation of some spur routes of U.S. Interstate 20Interstate 20 is an interstate highway in the southeastern United States. It goes from near Kent, Texas at Interstate 10 to Florence, South Carolina at Interstate 95. Length Major Cities Along the Route Fort Worth, Texas Dallas, Texas Tyler, Texas Longvie.
• The year A.D. 220Events Han Xiandi abdicated, symbolizing the end of the Han Dynasty and the beginning of the Three Kingdoms period in China. Cao Pi succeeds his father Cao Cao as ruler of the Kingdom of Wei Births Deaths Cao Cao, self-appointed prime minister of the Han.