2821

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This article is about a particular natural number.|View all articles on particular natural numbers

Summary

Factorization

The number 2821 is a square-free number with prime factors 7, 13, and 31. The prime factorization is as follows:

Properties and families

Property or family Parameter values First few members Proof of membership/containment/satisfaction
Carmichael number fifth among them 561, 1105, 1729, 2465, 2821, 6601, [SHOW MORE]View list on OEIS The universal exponent is which divides 2821 - 1 = 2820.
Poulet number (Fermat pseudoprime to base 2) eleventh among them 341, 561, 645, 1105, 1387, 1729, 1905, 2047, [SHOW MORE] View list on OEIS follows from being a Carmichael number.