+**851** is a [natural number](/wiki/Natural_Number), a composite product of the prime numbers 23 and 37. It also designates the [year](/wiki/Year) 851 AD, a period marked by early medieval events and chronicles across various cultures.
+## See also
+- [Number](/wiki/Number)
+- [Year](/wiki/Year)
+- [Composite Number](/wiki/Composite_Number)
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