Properties of the Number 87211

Eighty-Seven Thousand Two Hundred Eleven

Basics

Value: 87210 → 87211 → 87212

Parity: odd

Prime: Yes

Previous Prime: 87187

Next Prime: 87221

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 87211

Divisors: 1, 87211

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10101010010101011

Octal: 252253

Duodecimal: 42577

Hexadecimal: 154ab

Square: 7605758521

Square Root: 295.3150859675137

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

a(n) is the least prime such that the multiplicative order of 2 mod a(n) equals n, or a(n)=1 if no such prime exists. A112927

Largest prime factor of 2ⁿ + 1. A2587

a(n) is the least prime such that the multiplicative order of 4 mod a(n) equals n. A112092

Smallest primitive prime factor of 8ⁿ-1. A379641

Largest prime factor of 8ⁿ + 1. A274905

Primes which divide none of overpseudoprimes to base 2 (A141232). A144755

Prime factors of numbers in A006521 (numbers k that divide 2^k + 1). A57719

A006530(x)=2 is a local minimum if x=2ⁿ. Running upward with argument x, the largest prime divisor should increase. The value of first peak is a(n). A102643

The unique primitive prime factor of 2ⁿ-1 for the n in A161508. A161509

Largest primitive factor of 2²ⁿ⁺¹ + 1. A2589