Properties of the Number 16855

Sixteen Thousand Eight Hundred Fifty-Five

Basics

Value: 16854 → 16855 → 16856

Parity: odd

Prime: No

Previous Prime: 16843

Next Prime: 16871

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 5 × 3371

Divisors: 1, 5, 3371, 16855

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 100000111010111

Octal: 40727

Duodecimal: 9907

Hexadecimal: 41d7

Square: 284091025

Square Root: 129.82680770934792

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) = a(n-3) + a(n-4), with a(0)=1, a(1)=a(2)=0, a(3)=1. A17817

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order. A204642

Expansion of x/(1 - 2·x² - x³ + x⁴). A122514

Number of compositions of n into parts 3,4 where both parts are always present. A245487

Numerators of continued fraction convergents to sqrt(129). A41234

Numerators of continued fraction convergents to sqrt(516). A41986

a(n) = ∑_{1 <= x₁, x₂ <= n} gcd(x₁, x₂, n)⁵. A372927

a(n) = 11·a(n-1) + 6·a(n-2). A15598

Numbers k such that 225·2^k+1 is prime. A32489

Number of (n+2)X3 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically, diagonally or antidiagonally exactly three ways, and new values 0..3 introduced in row major order. A204635