Properties of the Number -1511

Five Hundred Eleven

Basics

Value: -1512 → -1511 → -1510

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 8

Digital Root: 8

Palindrome: No

Factorization: 1511

Divisors: 1, 1511

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: -10111100111

Octal: -2747

Duodecimal: -A5B

Hexadecimal: -5e7

Square: 2283121

Square Root: 38.87158345115362

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

Let φ = arccos(1/3), the dihedral angle of the regular tetrahedron. Then cos(n*φ) = a(n)/3ⁿ. A25172

Second differences of A000463; first differences of A188652. A188653

Numerators of column 3 of table described in A051714/A051715. A51720

Regular triangle, T(n, k) = f(n, k) - f(n, 0) + 1, where f(n, k) = ∑_j=0..k StirlingS1(n, n-j)*binomial(n,j) + ∑_j=0..n-k StirlingS1(n, n-j)*binomial(n, j), read by rows. A176155

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

Expansion of 1/(1+x+2·x³). A77974

Main diagonal of triangle A097094; g.f. A(x) satisfies A(x)/(1-x-x²) = A(x²)²/(1-x-x³)². A97095

Expansion of e.g.f. exp(∑_k>=1 x^k²*(1 - x^k²)/k²). A308397

Triangle read by rows: T(n,k) = ∑_i=0..n-1 binomial(n-1, i)*T(n-1-i,k-1) - ∑_i=1..n-1 binomial(n-1,i)*T(n-1-i,k) for 1 <= k <= n+1 with T(0,1) = 1 (and T(n,k) = 0 otherwise). A341287

Diagonal sums of triangle A110324. A110326