Properties of the Number 22145

Twenty-Two Thousand One Hundred Forty-Five

Basics

Value: 22144 → 22145 → 22146

Parity: odd

Prime: No

Previous Prime: 22133

Next Prime: 22147

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 5 × 43 × 103

Divisors: 1, 5, 43, 103, 215, 515, 4429, 22145

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011010000001

Octal: 53201

Duodecimal: 10995

Hexadecimal: 5681

Square: 490401025

Square Root: 148.81196188478935

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

a(n) = -a(n-1) - a(n-2) + a(n-3), a(0)=0, a(1)=0, a(2)=1. A57597

Triangle T(n,k) by rows: T(n, k) = (n-k+1)*T(n-1, k-1) + k·T(n-1, k) + T(n-2, k-1) with T(n, 1) = T(n, n) = 1. A144438

Triangle T(n,k), 0<=k<=n, read by rows, given by (0, 1, 1, 3, 3, 6, 6, 10, 10, 15, ...) δ (1, 0, 2, 0, 3, 0, 4, 0, 5, ...) where δ is the operator defined in A084938. A211183

Number of partitions of n with even crank. A124227

Numbers of the form prime(w)*prime(x)*prime(y) with w >= x >= y such that 2w = 3x + 4y. A358102

Numbers for which the root mean square of nontrivial divisors is an integer and which are not a square of prime numbers. A247137

a(n) = a(n-1) + a(n-2) + a(n-3). A7486

Numbers having four 3's in base 9. A43468

Numbers whose base-3 representation has exactly 10 runs. A43590

Numbers k such that number of runs in the base 3 representation of k is congruent to 1 mod 9. A43807