Properties of the Number 21884

Twenty-One Thousand Eight Hundred Eighty-Four

Basics

Value: 21883 → 21884 → 21885

Parity: even

Prime: No

Previous Prime: 21881

Next Prime: 21893

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 2 ² × 5471

Divisors: 1, 2, 4, 5471, 10942, 21884

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101010101111100

Octal: 52574

Duodecimal: 107B8

Hexadecimal: 557c

Square: 478909456

Square Root: 147.93241700181878

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

Mixing moments for the waiting time in an M/G/1 waiting queue. A289684

Matula-Goebel numbers of rooted trees in which all positive outdegrees are the same. A298424

The smallest k >= 0 that can be represented as a linear combination of 1², 2², ..., n² with coefficients +-1 and that cannot be represented using 1², 2², ..., m² with 1<=m<n. A392127

McKay-Thompson series of class 18h for Monster. A58546

Start with a(1)=1; for n >= 1, a(n+1)=a(n)+a(k) with k=[n-n-th digit of "e"]. If k<0 or k=0, then a(k)=0. A133392

Number of non-1-Hamiltonian simplicial polyhedra with n nodes. A7035

Expansion of 1/((1-x)(1-4x)(1-7x)(1-11x)). A21884

Number of (n+1)X(2+1) 0..3 arrays with the maximum of every 2X2 subblock equal. A236943

Number of (n+2)X(4+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 0 2 5 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 0 2 5 6 or 7. A252510