220 (number)
220 (
two hundred [and] twenty ) is the
natural number following 219 and preceding
Ordinal two hundred twenty
Cardinal two hundred twentieth
Factorization <math>220 = 2^2 \cdot 5 \cdot 11<math>
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 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 .
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 rams ("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 .
