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220 (number)
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Ordinal two hundred twenty
Cardinal two hundred twentieth
Factorization 220 = 2^2 \cdot 5 \cdot 11
Roman Numeral CCXX
Binary 11011100
Hexadecimal DC



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 284 . 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 Number s.


OTHER FIELDS

220 is:
  • A common Voltage in the United States and Canada .

  • 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 sheep ("two hundred ewes and twenty rams," Genesis 32:14).

  • An SMTP code meaning "service ready"

  • 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 or 220 BC .