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Properties of the Number 22421

Twenty-Two Thousand Four Hundred Twenty-One

Basics

Value: 22420 → 22421 → 22422

Parity: odd

Prime: No

Previous Prime: 22409

Next Prime: 22433

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 7 × 3203

Divisors: 1, 7, 3203, 22421

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 101011110010101

Octal: 53625

Duodecimal: 10B85

Hexadecimal: 5795

Square: 502701241

Square Root: 149.7364351118324

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

Number of compositions of n in which the largest part is equal to the number of parts. A98124
On a spirally numbered square grid, with labels starting at 1, this is the number of the last cell that a (1,n) leaper reaches before getting trapped, or -1 if it never gets trapped. A323471
Semiprimes that are the sum of the first n semiprimes for some n. A92190
a(n) = 1 + (n-1) + (n-2)*[(n-3)/2] + (n-3)*[(n-4)/2]*[(n-5)/3] + (n-4)*[(n-5)/2]*[(n-6)/3]*[(n-7)/4] +... where [x] = floor(x), with summation extending over the initial [n/2+1] products only. A207644
Number of partitions p of n not including ceiling(mean(p)) as a part. A241337
Triangle read by rows: T(m,n) is the label of the ending square of an (m,n)-leaper (a generalization of a chess knight) when it can no longer move, starting on a board with squares spirally numbered, starting at 1; 1 <= n < m. Each move is to the lowest-numbered unvisited square. A323750
Interprimes which are of the form s·prime, s=7. A75282
Numbers k such that k divides 1 + ∑j=1..k prime(j)17. A233556
Number of trees on n nodes with forbidden limbs. A14265
Kim-sums: "Kimberling sums" Kn + K10. A22421