Properties of the Number 21497

Twenty-One Thousand Four Hundred Ninety-Seven

Basics

Value: 21496 → 21497 → 21498

Parity: odd

Prime: No

Previous Prime: 21493

Next Prime: 21499

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 × 37 × 83

Divisors: 1, 7, 37, 83, 259, 581, 3071, 21497

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001111111001

Octal: 51771

Duodecimal: 10535

Hexadecimal: 53f9

Square: 462121009

Square Root: 146.61855271417735

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

Array read by antidiagonals: T(m,n) is the number of matchings in the stacked prism graph C_m X P_n. A287428

Number of matchings in graph C₄ X P_n. A33516

Number of integer compositions of n where adjacent parts are indivisible (either way) and the last and first part are also indivisible (either way). A318727

a(n) is the number of 5 element sets of distinct integer sided rectangles that fill an n X n square. A387241

Row sums of triangle A084408. A84411

Row sums of A325433. A325434

Number of matchings in graph P₂ X P₄ X P_n. A33527

Number of length n arrays x(i), i=1..n with x(i) in i..i+6 and no value appearing more than 2 times. A250349

Array read by antidiagonals: T(n,k) = number of completely symmetric polynomials of degree k up to momentum conservation for n particles (n >= 4, k >= 0). A226920

Decimal expansion of 1/493. A21497