220 (number)
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(Redirected from Two hundred twenty)
220 (two hundred [and] twenty) is the natural number following 219 and preceding 221.
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| 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 | ||
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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 numbers.
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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.fr:220 (nombre)