Properties of the Number 21477

Twenty-One Thousand Four Hundred Seventy-Seven

Basics

Value: 21476 → 21477 → 21478

Parity: odd

Prime: No

Previous Prime: 21467

Next Prime: 21481

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 7159

Divisors: 1, 3, 7159, 21477

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001111100101

Octal: 51745

Duodecimal: 10519

Hexadecimal: 53e5

Square: 461261529

Square Root: 146.55033265059484

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

G.f. satisfies: A(x) = ∑_n>=0 n!*xⁿ*A(x)ⁿ. A88368

Triangle T(n,k), n>=1, 0<=k<=n*(n+1)/2, read by rows: row n gives the coefficients of the chromatic polynomial of the n X n X n triangular grid, highest powers first. A193283

Integers which can be written in exactly three ways as sum of two distinct nonzero pentagonal numbers. A333013

Numbers whose binary and dual Zeckendorf representations are both palindromic. A331193

Numerators of continued fraction convergents to sqrt(780). A42504

Number of irreducible representations of symmetric group S_n for which every matrix has determinant 1. A45923

Numbers k such that 216·k+108 is a term of A097703 and A007494 and A098240. A98241

Augmentation of the triangular array P given by p(n,k)=k! for 0<=k<=n. See Comments. A193092

Binary palindromic numbers whose digit sum and aliquot sum are also binary palindromic. A363965

Number of n-colorings of the 5 X 5 X 5 triangular grid. A182790