Properties of the Number -8021

Twenty-One

Basics

Value: -8022 → -8021 → -8020

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 13 × 617

Divisors: 1, 13, 617, 8021

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1111101010101

Octal: -17525

Duodecimal: -4785

Hexadecimal: -1f55

Square: 64336441

Square Root: 89.56003573022959

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

E.g.f.: exp(x/(1 + x + x² + x³)). A293572

a(0)=a(1)=1 and a(n) = -(2·n-1)*a(n-1) + a(n-2) for n>=2. A142722

Partial sums of A299285. A299286

T(n,k)=Number of nXk 0..3 arrays with no more than floor(nXk/2) elements unequal to at least one horizontal or antidiagonal neighbor, with new values introduced in row major 0..3 order. A222906

Sum of primitive roots of n-th prime. A88144

Array A read by upward antidiagonals in which the entry A(n,k) in row n and column k is defined by A(n, k) = 4ⁿ*(6·k - 3 - 2*(-1)ⁿ) + (4ⁿ - 1)/3, n,k >= 1. A371100

Numbers whose square is the concatenation of two numbers k and k+8. A115440

Smallest k>n such that n³+1 divides k·n²+1. A71568

The n-th iterate of 27 with A371094. A372444

Number of isomorphism classes of nanocones with 4 pentagons and a nearsymmetric boundary of length n. A198016