Properties of the Number 5621

Five Thousand Six Hundred Twenty-One

Basics

Value: 5620 → 5621 → 5622

Parity: odd

Prime: No

Previous Prime: 5591

Next Prime: 5623

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 7 × 11 × 73

Divisors: 1, 7, 11, 73, 77, 511, 803, 5621

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010111110101

Octal: 12765

Duodecimal: 3305

Hexadecimal: 15f5

Square: 31595641

Square Root: 74.97332859090625

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) = (2·n+5)*(2·n+1). A78371

T(n,k)=Number of nondecreasing -k..k vectors of length n whose dot product with some other -k..k vector equals n. A226340

Fundamental discriminants of real quadratic number fields with class number 6. A218156

a(n) = number of length-n sequences s with s[1]=1, s[2]=1, s[k-1] <=s[k] <= s[k-2]+s[k-1] (s is called a sub-Fibonacci sequence of length n). A5269

a(n) = f(1,n,n), where f is the Sudan function defined in A260002. A260006

T(n,k)=Number of nXk 0..1 arrays with every element unequal to 1, 2, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A318552

a(n) = (4·n+1)*(4·n+5). A3185

a(n) = n*(25·n - 39)/2. A263231

Numbers k such that k·primorial(2473)-1 is prime. A87832

Number of squares on infinite quarter chessboard at <=n knight moves from the corner. A98500