Properties of the Number -227

Two Hundred Twenty-Seven

Basics

Value: -228 → -227 → -226

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 11

Digital Root: 2

Palindrome: No

Factorization: 227

Divisors: 1, 227

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -11100011

Octal: -343

Duodecimal: -16B

Hexadecimal: -e3

Square: 51529

Square Root: 15.066519173319364

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(9) and N(9) 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. A226929

Coefficients in the power series A(x) such that: 1 = ∑_n=-oo..+oo xⁿ * (1 - xⁿ⁺¹)ⁿ⁺¹ * A(x)ⁿ. A357200

Signed primes: if prime(n) even, a(n) = 0; if prime(n) == 1 (mod 4), a(n) = prime(n); if prime(n) == -1 (mod 4), a(n) = -prime(n). A73579

A linear mapping a(n) = x + d·n of pairs of integers (x,d), where the pairs are enumerated by a number spiral along antidiagonals. A304587

Expansion of (1 - 2·x²)/(1 + x)³. Second column of Riordan triangle A248156. A248158

a(n) = bin_prime_sum(fibonacci(A001651[n])), where fibonacci(A001651[n]) is A014437[n]. A59878

Primes or negative values of primes of the form 8·n² - 298·n + 2113 for n >= 0. A217439

Primes or negative values of primes of the form 8·n² - 326·n + 2659 for n >= 0. A217440

Irregular array read by rows of numerators in which row n has one numerator from each irreducible cycle of n rational numbers under iteration by the 3x+1 function. (See Comments for selection and order of numerators.) A226605

Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of exp(-∑_j>0 sigma_k(j)*x^j/j) in powers of x. A294947