Properties of the Number -811

Eight Hundred Eleven

Basics

Value: -812 → -811 → -810

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 811

Divisors: 1, 811

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -1100101011

Octal: -1453

Duodecimal: -577

Hexadecimal: -32b

Square: 657721

Square Root: 28.478061731796284

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

Row sums of a number triangle related to the Pell numbers. A110331

Triangle of coefficients of Gaussian polynomials [2n+7,6]_q represented as finite sum of terms (1+q²)^k*q^g-k, where k = 0,1,...,g with g=6n+3. A267486

a(n) = 36·n² - 810·n + 2753, producing the conjectured record number of 45 primes in a contiguous range of n for quadratic polynomials, i.e., abs(a(n)) is prime for 0 <= n < 44. A117081

First differences of A000463. A188652

Expansion of ψ(x⁶) / ψ(x) in powers of·where ψ() is a Ramanujan θ function. A262160

Expansion of f(-x³)³ / (f(x)² * f(-x²)) in powers of·where f() is a Ramanujan θ function. A262151

Abundance values of numbers whose abundance is (+-1) times a prime. A88006

Value k at the n-th step of A371282, where multiplied values are positive and subtracted values are negative. A371295

Expansion of ∏_k>=1 (1 - x^k)^q(k), where q(k) = number of partitions of k into distinct parts (A000009). A304783

Diagonal sums of number a triangle related to the Pell numbers. A110332