Properties of the Number 16443

Sixteen Thousand Four Hundred Forty-Three

Basics

Value: 16442 → 16443 → 16444

Parity: odd

Prime: No

Previous Prime: 16433

Next Prime: 16447

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ⁴ × 7 × 29

Divisors: 1, 3, 7, 9, 21, 27, 29, 63, 81, 87

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 100000000111011

Octal: 40073

Duodecimal: 9623

Hexadecimal: 403b

Square: 270372249

Square Root: 128.23026163897507

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

Nonnegative values·of solutions (x, y) to the Diophantine equation x²+(x+881)² = y². A130014

a(n) = n*(19·n-15)/2. A226490

a(n) = A341652(A341651(n)). A341653

a(n) = (n-5)*(n-6)*(n-7)*(n-16)/24. A167543

Numbers k such that φ(k)/k = 16/29. A172344

Odd numbers k > 1 such that A309906(k-1) < A309906(k) > A309906(k+1) < A309906(k+2) > A309906(k+3). A349938

a(n) is the numerator of the ratio of winning probabilities P_A/P_B of winning in a 2-player game with a ratio of odds for A and B in a single round of 3:2. To win the game it is necessary to win n rounds in a row. A370827

Expansion of (1 - 9·x*(1 - 9·x)^1/3)^1/3. A377244

Triangle read by rows: T(n,k) = binomial(3n+3, k)*(n-k+1)/(n+1). A64282

Number of n X 2 0..4 arrays with each element·equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4. A196450