Properties of the Number -221184

Two Hundred Twenty-One Thousand One Hundred Eighty-Four

Basics

Value: -221185 → -221184 → -221183

Parity: even

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 ¹³ × 3 ³

Divisors: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110110000000000000

Octal: -660000

Duodecimal: -A8000

Hexadecimal: -36000

Square: 48922361856

Square Root: 470.3020306143702

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: Yes

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

Binomial transform of [1, 2, -3, -4, 5, 6, -7, -8, 9, 10, ...]. A140230

Expansion of g.f. (1+2·x)/(1-2·x)². A14480

16-almost primes (generalization of semiprimes). A69277

Orders of finite Abelian groups having the incrementally largest numbers of nonisomorphic forms (A046054). A46055

a(n) = ∏_k=1..n d(k); d(k) = A000005(k) is the number of positive divisors of k. A66843

Table T(n,k) giving number of spanning trees in complete bipartite graph K(n,k), read by antidiagonals. A72590

Analog of A095236 when the phones are arranged in a circle. A95239

p-INVERT of (1,0,0,1,0,0,0,0,0,...), where p(S) = (1 - S)². A292324

Numbers that are the smallest number with product of prime exponents k for some k. Sorted positions of first appearances in A005361, unsorted version A085629. A353500

Numbers of form 4ⁱ*6^j, with i, j >= 0. A25618