211
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Number
$211$ (two hundred and eleven) is:
- The $47$th prime number
- The $4$th Euclid number after $3$, $7$, $31$:
- $211 = p_4\# + 1 = 2 \times 3 \times 5 \times 7 + 1$
- The $5$th Euclid prime after $2$, $3$, $7$, $31$:
- $211 = p_4\# + 1 = 2 \times 3 \times 5 \times 7 + 1$
- The $5$th balanced prime after $5$, $53$, $157$, $173$:
- $211 = \dfrac {199 + 223} 2$
- The $8$th near-repdigit prime after $101$, $113$, $131$, $151$, $181$, $191$, $199$
- The $41$st lucky number:
- $1$, $3$, $7$, $9$, $13$, $15$, $21$, $\ldots$, $163$, $169$, $171$, $189$, $193$, $195$, $201$, $205$, $211$, $\ldots$
Also see
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