Properties of the Number 21633

Twenty-One Thousand Six Hundred Thirty-Three

Basics

Value: 21632 → 21633 → 21634

Parity: odd

Prime: No

Previous Prime: 21617

Next Prime: 21647

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 7211

Divisors: 1, 3, 7211, 21633

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010010000001

Octal: 52201

Duodecimal: 10629

Hexadecimal: 5481

Square: 467986689

Square Root: 147.08160999934697

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

Numbers k with property that average digit of k² is s=7. A164773

G.f.: A(x) = exp( ∑_n>=1 σ(n)*xⁿ/(1+xⁿ) /n ). A158441

a(n) = 32·n² + 1. A158575

a(n) = number of terms in row n of the array A378282. A378286

a(n) = 676·n + 1. A158386

First lower diagonal of Parker's triangle A047812. A335323

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 98. A31596

Number of conjugacy classes in the symmetric group S_n that have even number of elements. A60643

Primes p such that the polynomial x² + x + p generates only primes for x = 1..7. A187060

Number of 7Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 1 1 and 1 0 1 vertically. A207767