Properties of the Number -2281

Two Hundred Eighty-One

Basics

Value: -2282 → -2281 → -2280

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

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

2196 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

Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = ∑_j=0..n (-k)^j * binomial(n,j)³. A336179

McKay-Thompson series of class 30a for Monster. A58619

Main diagonal of A291701. A291702

a(n) = ∑_k=0..n (-2)^k * binomial(n,k)³. A336181

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