Properties of the Number 22981

Twenty-Two Thousand Nine Hundred Eighty-One

Basics

Value: 22980 → 22981 → 22982

Parity: odd

Prime: No

Previous Prime: 22973

Next Prime: 22993

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 7 ³ × 67

Divisors: 1, 7, 49, 67, 343, 469, 3283, 22981

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101100111000101

Octal: 54705

Duodecimal: 11371

Hexadecimal: 59c5

Square: 528126361

Square Root: 151.594854793954

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

Composite numbers whose prime factors contain no digits other than 6 and 7. A36322

Numbers of squares formed by this procedure on n-th step: Step 1, draw a unit square. Step n, draw a unit square with center in every intersection of lines of the figure in step n-1. A336288

Number of length n+2 0..6 arrays with no three elements in a row with pattern aba or abb (with a≠b) and new values 0..6 introduced in 0..6 order. A243515

Partial sums of A299896. A299897

Number of ordered trees with n+1 leaves, no node of outdegree 1, and having as many leaves marked as the number of nodes of outdegree greater than 1. A368178

T(n,k)=Number of length n+2 0..k arrays with no three elements in a row with pattern aba or abb (with a≠b) and new values 0..k introduced in 0..k order. A243519

a(n) = 25-n. A22981

Number of comparability perfect graphs on n nodes. A123416