Properties of the Number 21473

Twenty-One Thousand Four Hundred Seventy-Three

Basics

Value: 21472 → 21473 → 21474

Parity: odd

Prime: No

Previous Prime: 21467

Next Prime: 21481

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 109 × 197

Divisors: 1, 109, 197, 21473

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

4823 Try Today's Challenge

Representations

Binary: 101001111100001

Octal: 51741

Duodecimal: 10515

Hexadecimal: 53e1

Square: 461089729

Square Root: 146.53668482670133

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

T(n,k)=1/12 the number of (n+2)X(k+2) 0..2 arrays with each 3X3 subblock containing three of each value. A184386

a(n) = [ a(n-1)/a(1) ] + [ a(n-2)/a(2) ] + ... + [ a(1)/a(n-1) ], for n >= 3. A22864

Primitive subsequence of A111105. A137559

Composite hypotenuses of primitive Pythagorean triangles (A120961) that are not circumdiameters of non-Pythagorean primitive Heronian triangles (A285579). A329148

1/12 the number of (n+2)X5 0..2 arrays with each 3X3 subblock containing three of each value. A184380

1/12 the number of (n+2)X6 0..2 arrays with each 3X3 subblock containing three of each value. A184381

Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 475", based on the 5-celled von Neumann neighborhood. A272449

Decimal expansion of QRS constant. A131329

Decimal expansion of 1/469. A21473