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211 (number)
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211 (number) : ウィキペディア英語版
211 (number)

211 is the natural number between 210 and 212. It is also a prime number.
==In mathematics==

211 is an odd number.
211 is a primorial prime, sum of three consecutive primes (67 + 71 + 73), Chen prime, centered decagonal prime, and self prime.
211 is a repdigit in base 14 (111).
Multiplying its digits, it is still a prime (2), and adding its digits, it is square (4). Rearranging its digits, 211 becomes 121, which also is a square. Adding any two of its digits will be prime (2 or 3).

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「211 (number)」の詳細全文を読む



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