131st

The number 131 is a prime number, meaning it is only divisible by 1 and itself. It is the 32nd prime number. In the sequence of natural numbers, 131 follows 130 and precedes 132.

The year 131 AD was a year in the 2nd century. The Roman Empire was under the rule of Emperor Hadrian. Significant events from this year are less commonly documented in readily accessible historical records.

In some contexts, "131st" might refer to a specific ordinal position within a sequence or list. For example, it could denote the 131st item in a series, the 131st day of a year, or the 131st individual in a ranking. Without further context, the precise meaning of "131st" remains open to interpretation.

The number 131 also appears in various mathematical contexts, such as number theory and combinatorics, often as a component in calculations or theorems. It's a number that can be used in equations and forms part of larger numerical structures.