210 (number)
Encyclopedia : 2 : 21 : 210 : 210 (number)
210 is the natural number following 209 and preceding 211.
| |
| Cardinal | Two hundred [and] ten |
| Ordinal | 210th Two hundred [and] tenth |
| Factorization | [2 \cdot 3 \cdot 5 \cdot 7 ] |
| Divisors | 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105 |
| Roman numeral | CCX |
| Binary | 11010010 |
| Hexadecimal | D2 |
In mathematics
210 is a composite number, an abundant number.It is a triangular number (following 190 and preceding 231), a pentagonal number (following 176 and preceding 247), the second smallest to be both triangular and pentagonal. (The third is 40755).
It is also a pentatope number, a pronic number, a Harshad number, and an untouchable number. 210 is also the first 71-gonal number, preceding 418.
210 is the sum of eight consecutive prime numbers (13 + 17 + 19 + 23 + 29 + 31 + 37 + 41 = 210) and the product of the first four prime numbers, and thus a primorial.
In other fields
210 is also:- The area code of metropolitan San Antonio, Texas.
- The number for various spur routes of Interstate 10 in the United States. I-210 is the number of an interstate highway in California, Interstate 210 (California), as well as one in Louisiana, Interstate 210 (Louisiana). I-210 used to be the number of an interstate highway in Alabama, but has since been changed.
- The year AD 210 or 210 BC.
Reference
- Wells, D. (1987). The Penguin Dictionary of Curious and Interesting Numbers (p. 143). London: Penguin Group.
211-219
Two hundred eleven 211 prime, primorial prime, sum of three consecutive primes (67 + 71 + 73), balanced prime, Chen prime, centered decagonal number, self number, also, SMTP status code for system status
Two hundred twelve 212 = 22·53, totient sum for the first 26 integers. Also in degrees Fahrenheit, the boiling point of water at sea level, also the area code for New York, New York.
Two hundred thirteen 213 = 3·71, also the area code for Los Angeles, California.
Two hundred fourteen 214 = 2·107, Mertens function returns 0, nontotient, also the number of bones in a normal human skeleton according to Sarah in , form DD 214 documents discharge from the U.S. Armed Forces, SMTP status code for help message
Two hundred fifteen 215 = 5·43. Also, spur routes of Interstate 15. Form DD 215 is for corrections to form DD 214. Repdigit in base 6 (555).
Two hundred sixteen 216 = 23·33 = 63 = 33 + 43 + 53, making it the smallest cube that's also the sum of three cubes; sum of a twin prime (107 + 109), Harshad number, untouchable number, also the number of colors in the Netscape Web-safe color palette; also ISO 216 is the ISO's standard for paper sizes
Two hundred seventeen 217 = 7·31, centered hexagonal number
Two hundred eighteen 218 = 2·109, Mertens function(218) = 3 a record high that stands until 219, nontotient, noncototient
Two hundred nineteen 219 = 3·73, Mertens function(219) = 4 a record high that stands until 221, 219 is a repdigit in base 8 (333).
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