Properties of the Number -2801

Eight Hundred One

Basics

Value: -2802 → -2801 → -2800

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 2801

Divisors: 1, 2801

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -101011110001

Octal: -5361

Duodecimal: -1755

Hexadecimal: -af1

Square: 7845601

Square Root: 52.92447448959697

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

Values of n such that L(10) and N(10) are both prime, where L(k) = (n²+n+1)*2^2·k + (2·n+1)*2^k + 1, N(k) = (n²+n+1)*2^k + n. A227448

Expansion of -1/(1 + x + x² + x³ + x⁴ - x⁵). A124314

Expansion of ∏_k>=1 1/(1 + k^k*x^k). A292311

Euclid-Mullin sequence: a(1) = 2, a(n+1) is smallest prime factor of 1 + ∏_k=1..n a(k). A945

a(n) = (7ⁿ - 1)/6. A23000

Primes of the form 1 + n + n² + n³ + ... + n^k, n > 1, k > 1. A85104

D-toothpick sequence of the second kind (see Comments lines for definition). A194270

Array read by antidiagonals: T(n,k) is the number of sublattices of index n in generic k-dimensional lattice (n >= 1, k >= 1). A160870

Prime numbers that are the sum of the divisors of some n. A23195

a(n) = n⁴ + n³ + n² + n + 1. A53699