Properties of the Number 22138

Twenty-Two Thousand One Hundred Thirty-Eight

Basics

Value: 22137 → 22138 → 22139

Parity: even

Prime: No

Previous Prime: 22133

Next Prime: 22147

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 2 × 11069

Divisors: 1, 2, 11069, 22138

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011001111010

Octal: 53172

Duodecimal: 1098A

Hexadecimal: 567a

Square: 490091044

Square Root: 148.78844041120936

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

The EG1 triangle. A162005

E.g.f.: S(x,k) = Integral C(x,k)*D(x,k)² dx, such that C(x,k)² - S(x,k)² = 1, and D(x,k)² - k²*S(x,k)² = 1, as a triangle of coefficients read by rows. A322230

E.g.f.: S(x,k) = -i·sn( i·Integral C(x,k) dx, k) such that C(x,k) = cn( i·Integral C(x,k) dx, k), where S(x,k) = ∑_n>=0 ∑_j=0..n T(n,j) * x^2·n+1*k^2·j/(2·n+1)!, as a triangle of coefficients T(n,j) read by rows. A325220

G.f. satisfies: A(x) = exp( ∑_n>=1 (A(x)ⁿ + A(-x)ⁿ) * xⁿ/n ). A171190

Number of similarity classes of triangles which can be drawn using the lattice points in an n X n grid for vertices. A28492

Number of acyclic ketone and aldehyde stereo-isomers with n carbon atoms. A5957

Difference between the n-th partial sum of the squares (A000330) and the n-th partial sum of the primes (A007504). A108753

Partial sums of floor(3ⁿ/4). A178222

Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 12. A31600

Integers n such that the digit set of n² is {0,1,4,9}. A317579