Properties of the Number 16445

Sixteen Thousand Four Hundred Forty-Five

Basics

Value: 16444 → 16445 → 16446

Parity: odd

Prime: No

Previous Prime: 16433

Next Prime: 16447

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 5 × 11 × 13 × 23

Divisors: 1, 5, 11, 13, 23, 55, 65, 115, 143, 253

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000000111101

Octal: 40075

Duodecimal: 9625

Hexadecimal: 403d

Square: 270438025

Square Root: 128.2380598730346

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

Values of n such that L(12) and N(12) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227515

Number of bracelets (turnover necklaces) of n beads of 2 colors, 5 of them black. A32279

1/256 of tenth unsigned column of triangle A053120 (T-Chebyshev, rising powers, zeros omitted). A54333

Triangle read by rows: T(n, k) = number of permutations that are k "block reversals" away from 12...n, for n >= 0, and (for n>0) 0 <= k <= n-1. A300003

G.f.: ∑_n=-oo..+oo x^n*(n+1/2) * C(x)^2·n-1, where C(x) = 1 + x·C(x)² is the g.f. of the Catalan numbers (A000108). A355345

Number of polygons formed outside a regular n-gon when every pair of vertices of the n-gon are joined by an infinite line. A344311

Numbers k such that sopfr(k + sopfr(k)) = sopfr(k) + sopfr(sopfr(k)), where sopfr = A001414. A376851

Number of positive clusters of type D_n. A129869

G.f. A(x) satisfies A(x) = 1 + x⁴*(1+x)*A(x)². A366589

Number of intersection points outside the n-gon of all lines through pairs of vertices of a regular n-gon. A146213