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The Number 561: Properties and Meanings
Prime Factors of 561=3x11x17.
561 is a Triangular Number.
561 is a Hexagonal Number.
561 is a 12-gonal Number.
561 is a 39-gonal Number.
561 is a 188-gonal Number.
561 is a Centered 20-gonal Number.
561 Ingwelde is a minor planet orbiting the Sun.
The Year 561 AD
In the year 561 AD Jnanagupta began translating Buddhist texts into Chinese.
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