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Properties of the Number -8220

Two Hundred Twenty

Basics

Value: -8221 → -8220 → -8219

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 2 × 3 × 5 × 137

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

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: -10000000011100

Octal: -20034

Duodecimal: -4910

Hexadecimal: -201c

Square: 67568400

Square Root: 90.66421565314509

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

G.f. A(x) satisfies: ∑n>=0 log(A(3n*x))n/n! = 1 + ∑n>=0 33n-n*x3n. A167003
Maximal coefficient of ∏k<=n (1 + xk). Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0 or 1. A25591
Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0. A63865
Numbers n that raised to the powers from 1 to k (with k>=1) are multiple of the sum of their digits (n raised to k+1 must not be a multiple). Case k=8. A135193
Number of solutions to +- 1 +- 2 +- 3 +- ... +- n = 0 or +- 1. A63867
Number of 6-element ordered T0-antichains on an unlabeled n-set; T1-hypergraphs on 6 labeled nodes with n (not necessarily empty) distinct hyperedges (n=0,1,...,64). A59049
T(n,k)=Number of lower triangular n X n arrays colored with integers 0 upwards introduced in row major order, with no element equal to any horizontal, diagonal or antidiagonal neighbor, and containing the value n(n+1)/2-k-1. A212026
Numbers k such that k+1 is a prime, k+2 is twice a prime, and k+3 is three times a prime. A278583
Number of move operations required to sort all permutations of [n] by MTF sort. A279683
Averages of twin prime pairs which are a sum of averages of two consecutive twin prime pairs. A160916