Properties of the Number -21306

Twenty-One Thousand Three Hundred Six

Basics

Value: -21307 → -21306 → -21305

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 2 × 3 × 53 × 67

Divisors: 1, 2, 3, 6, 53, 67, 106, 134, 159, 201

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101001100111010

Octal: -51472

Duodecimal: -103B6

Hexadecimal: -533a

Square: 453945636

Square Root: 145.96574940718114

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

Denominators of convergents to the diesis log₂(5/4). A46104

Number of ways to write n as an ordered sum of 5 prime powers (including 1). A341134

A list of equal temperaments (equal divisions of the octave) whose nearest scale steps are closer and closer approximations to the pair of ratios 5/4 and 8/5 which generate two complementary tones of musical harmony, the Major 3rd (5/4) and the Minor 6th (8/5). A61918

Number of binary strings of length n with equal numbers of 00011 and 11000 substrings. A164233

a(n) = (3·n-1)*(n⁴-18·n³+179·n²-582·n+720)/120. A381193

Duplicate of A046104. A116984

Number of ways to place zero or more nonadjacent 1,1 2,0 2,1 2,2 3,1 4,1 4,2 polyhexes in any orientation on a planar nXnXn triangular grid. A155317