Properties of the Number -207775

Two Hundred Seven Thousand Seven Hundred Seventy-Five

Basics

Value: -207776 → -207775 → -207774

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 28

Digital Root: 1

Palindrome: No

Factorization: 5 ² × 8311

Divisors: 1, 5, 25, 8311, 41555, 207775

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -110010101110011111

Octal: -625637

Duodecimal: -A02A7

Hexadecimal: -32b9f

Square: 43170450625

Square Root: 455.8234307272938

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

Lower triangular matrix, read by rows: T(i,j) = number of ways i seats can be occupied by any number k (0<=k<=j<=i) of persons. A86885

Row sums of unsigned triangle A062137 (generalized a=3 Laguerre). A62147

Triangle read by rows: ∑_j=0..k binomial(n, j)*binomial(k, j)*j!. A176120

Sum of an infinite series: a(n) = ∑_{k = 0..infinity} ((1/27) * (3ⁿ)³ * γ(n+1/3·k+1/3) * γ(n+1/3·k+2/3) * γ(n+1/3·k+1)) / (γ(4/3+1/3·k) * γ(5/3+1/3·k) * γ(2+1/3·k) * exp(1) * k!). A72020

a(n) = n! * ∑_k=0..n binomial(2·n-3,k)/(n-k)!. A380491

a(n) = (3*(n-1)+3)! *(3*(n-1)+6)! *2F2(3·n+1,3·n+4; 4,7; 1)/( 3! *6! *exp(1)), where 2F2(;;) is the generalized hypergeometric series. A72679