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The Number 217: Properties and Meanings
Prime Factors of 217=7x31.217 is a 12-gonal Number.
217 is a Centered Hexagonal Number.
217 is a Centered 36-gonal Number.
The Year 217 AD
In the year 217 AD Caracalla, Roman Emperor was assassinated.In the year 217 AD Macrinus, of Mauritania, became the first equestrian Roman Emperor.
In the year 217 AD Pope Callixtus I succeeded Pope Zephyrinus as the sixteenth pope.
The Main Number Sections:
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