Properties of the Number 21696

Twenty-One Thousand Six Hundred Ninety-Six

Basics

Value: 21695 → 21696 → 21697

Parity: even

Prime: No

Previous Prime: 21683

Next Prime: 21701

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 2 ⁶ × 3 × 113

Divisors: 1, 2, 3, 4, 6, 8, 12, 16, 24, 32

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010011000000

Octal: 52300

Duodecimal: 10680

Hexadecimal: 54c0

Square: 470716416

Square Root: 147.29562111617574

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

Expansion of 1/(1-4x-4x³). A89979

Structured truncated octahedral numbers. A100155

a(n) in base 15 is a repdigit. A48339

Index of first occurrence of n in A364197. A364198

Sums of Pythagorean sextuples in increasing order: The sums of sets of six natural numbers which correspond to the lengths of the edges of a tetrahedron whose four faces are all different Pythagorean triangles. A248548

Number of binary strings w of length n that cannot be written in the form xyz, with x,z both nonempty and xz a square. A323446

Conjectured number of irreducible multiple ζ values of depth 8 and weight 2n+22. A22496

Numbers k such that the continued fraction for sqrt(k) has even period and if the last term of the periodic part is deleted the central term is 73. A31571

Triangle read by rows: T(n,k) is the number of Motzkin paths of length n and having k peaks at odd height. A97891

Numbers k such that 327·2^k+1 is prime. A322956