Properties of the Number 22554

Twenty-Two Thousand Five Hundred Fifty-Four

Basics

Value: 22553 → 22554 → 22555

Parity: even

Prime: No

Previous Prime: 22549

Next Prime: 22567

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 ² × 7 × 179

Divisors: 1, 2, 3, 6, 7, 9, 14, 18, 21, 42

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101100000011010

Octal: 54032

Duodecimal: 11076

Hexadecimal: 581a

Square: 508682916

Square Root: 150.1798921294059

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

Least positive k such that k * [RSA-640]ⁿ - 1 is prime, where RSA-640 is the 193 decimal digit RSA challenge number A391940(14). A108573

a(n+1) = floor( (a(n) + 1)^{1 + 1/n} ), with a(1) = 1. A80869

Number of lines through at least 2 points of a 9 X n grid of points. A160849

Smallest integer areas of integer-sided triangles where at least one side is of length prime(n). A229159

a(n) = sum{k=0..floor(n/2), C(2·n-3·k, n)*C(n-k, k)}. A105871

Expansion of F(x) where F(x) = 1 + x / (1 - x·F(x) - x² * F(x²) ). A238428

a(n) = gpf(a(n-3))*gpf(a(n-2)) + gpf(a(n-1)), with a(1)=a(2)=1 and a(3)=2 and where gpf(n) is the greatest prime dividing n, A006530(n). A258804

Expansion of (E₄(q) - 28·E₄(q²) + 63·E₄(q³) - 36·E₄(q⁶)) / 240. A288485

A sequence related to Ramanujan's τ function. A55978

a(n) = ∑_k=0..n floor(sqrt(k)). A22554