Properties of the Number 22819

Twenty-Two Thousand Eight Hundred Nineteen

Basics

Value: 22818 → 22819 → 22820

Parity: odd

Prime: No

Previous Prime: 22817

Next Prime: 22853

Digit Sum: 22

Digital Root: 4

Palindrome: No

Factorization: 19 × 1201

Divisors: 1, 19, 1201, 22819

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101100100100011

Octal: 54443

Duodecimal: 11257

Hexadecimal: 5923

Square: 520706761

Square Root: 151.0595908904827

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

Expansion of ((1 + x - 2x²) + (1+x)*sqrt(1-4x²))/(2(1-4x²)). A116406

Expansion of (sqrt(1 - 4·x) + (1 - 2·x))/(2*(1 - 4·x)). A114121

a(n) = ∑_k=0..8 binomial(n,k). A8861

Numbers n such that n!! + 2² is prime. A76186

a(n) = 2ⁿ - C(n,0) - C(n,1) - ... - C(n,6). A35039

Numbers k such that the digits of k³ occur with the same frequency. A52047

Numbers k such that k³ is a cube whose digits occur with an equal minimum frequency of 2. A52051

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 6 or 7 king-move adjacent elements, with upper left element zero. A299180

T(n,k)=Number of nXk 0..1 arrays with every element equal to 0, 1, 2, 3, 6, 7 or 8 king-move adjacent elements, with upper left element zero. A299942

a(n) = number of subsets of {1,2,...,n} that contain more nonprimes than primes. A369853