The 220 (number) reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

220 (number)

220 (two hundred twenty) is the natural number following two hundred nineteen and preceding two hundred twenty-one.

220
Ordinal	two hundred twenty
Cardinal	two hundred twentieth
Roman numeral	CCXX
Binary	11011100
Hexadecimal	DC

Table of contents

1 Mathematics 2 Cultural associations 3 Other fields 4 External link

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, and its factorization is

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.

Other fields

Two hundred twenty is:

• A common voltage in the United States and Canada.
• A film format for medium format cameras (see 120 film).
• The designation of some spur routes of U.S. Interstate 20.
• The year A.D. 220.

External link

• Googlism: 220, hundred twenty&type=2 two hundred twenty

This is the "220 (number)" reference article from the English Wikipedia. All text is available under the terms of the GNU Free Documentation License. See also our Disclaimer.