Properties of the Number 2281

Two Thousand Two Hundred Eighty-One

Basics

Value: 2280 → 2281 → 2282

Parity: odd

Prime: Yes

Previous Prime: 2273

Next Prime: 2287

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 2281

Divisors: 1, 2281

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 100011101001

Octal: 4351

Duodecimal: 13A1

Hexadecimal: 8e9

Square: 5202961

Square Root: 47.75981574503821

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

Mersenne exponents: primes p such that 2^p - 1 is prime. Then 2^p - 1 is called a Mersenne prime. A43

Centered 12-gonal numbers, or centered dodecagonal numbers: numbers of the form 6·k*(k-1) + 1. A3154

Primes whose decimal representation is a valid number in base 9 and interpreted as such is again a prime. A235395

Primes whose base-3 representation also is the base-2 representation of a prime. A235265

Primes with 7 as smallest primitive root. A1126

Concentric hexagonal numbers: floor(3·n²/2). A32528

Primes of the form x² + 24·y². A107008

a(n) = 4·n² - 9·n + 6. A54556

Friedlander-Iwaniec primes: Primes of form a² + b⁴. A28916

Primes of the form x² + 45y². A107152