Properties of the Number -2549

Five Hundred Forty-Nine

Basics

Value: -2550 → -2549 → -2548

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 2549

Divisors: 1, 2549

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -100111110101

Octal: -4765

Duodecimal: -1585

Hexadecimal: -9f5

Square: 6497401

Square Root: 50.48762224545735

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

a(n) = A256357(n²), where exp( ∑_n>=1 A256357(n)*xⁿ/n ) = 1 + ∑_n>=1 x^n² + x^2·n². A258655

a(n) = n! * ∑_{k=0..floor(n/2)} (-k)^k / (k! * (n-2·k)!). A362337

a(n) = n + (n+1)². A28387

Number of reduced words of length n in the Weyl group E₆ on 6 generators and order 51840. A161409

Table by antidiagonals of T(n,k) = n·T(n,k-1) + T(n,k-2) starting with T(n,1) = 1. A73133

Array A(n,k) = n·A(n,k-1) + A(n,k-2) read by upward antidiagonals, starting A(n,0) = 0, A(n,1) = 1. A172236

a(n) = 7·a(n-1) + a(n-2), with a(0)=1 and a(1)=7. A54413

Primes of the form k² - k - 1. A2327

Members of A164368 which are not Ramanujan primes. A164288

Primes congruent to 29 (mod 30). A132236