Properties of the Number 22947

Twenty-Two Thousand Nine Hundred Forty-Seven

Basics

Value: 22946 → 22947 → 22948

Parity: odd

Prime: No

Previous Prime: 22943

Next Prime: 22961

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 7649

Divisors: 1, 3, 7649, 22947

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101100110100011

Octal: 54643

Duodecimal: 11343

Hexadecimal: 59a3

Square: 526564809

Square Root: 151.4826722764026

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(0) = ... = a(3) = 1; a(n) = a(n-4) + ∑_k=0..n-5 a(k) * a(n-k-5). A343305

Numbers n such that σ(2*φ(n)) = 2*σ(n). A137733

Diagonal sums of number triangle A113582. A154324

T(n,4), array T as in A054134. A54138

a(1) = 1, a(2) = 2; for n >= 3, a(n) = (n-1)³ - a(n-1) - a(n-2). A361134

G.f. A(x) satisfies: 1 = ∑_n>=0 ((1+x)^4·n - A(x))ⁿ. A321604

a(n) = a(n-1) + c(n) for n >= 3, a( ) increasing, given a(1)=1 a(2)=3; where c( ) is complement of a( ). A22947