Properties of the Number -21300

Twenty-One Thousand Three Hundred

Basics

Value: -21301 → -21300 → -21299

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 6

Digital Root: 6

Palindrome: No

Factorization: 2 ² × 3 × 5 ² × 71

Divisors: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001100110100

Octal: -51464

Duodecimal: -103B0

Hexadecimal: -5334

Square: 453690000

Square Root: 145.94519519326425

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) = n*(8·n² - 5)/3. A63523

T(n,k)=Number of nXk 0..1 arrays with all rows and columns having a nonnegative second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative. A223227

First appearance of 2ⁿ in A281130. A281131

G.f.: ∑_n>=0 (x^2·n-1 + 1)ⁿ * xⁿ / (1 + x^2·n+1)ⁿ⁺¹, an even function. A326602

a(n) = ∑_t=0..n g(t)*g(n-t) where g(t) = A002121(t). A2122

McKay-Thompson series of class 30E for Monster. A58616

a(0)=1; a(n) = sigma₁(n) + sigma₂(n) + sigma₃(n). A92347

Number of nX3 0..1 arrays with all rows and columns having a nonnegative second derivative in a quadratic least squares fit, with one and two element arrays taken as having a zero second derivative. A223222

Number of partitions p of n not containing ceiling((min(p) + max(p))/2) as a part. A238485

Number of maximal cliques in the n-polygon diagonal intersection graph. A291949