Properties of the Number 518

Five Hundred Eighteen

Basics

Value: 517 → 518 → 519

Parity: even

Prime: No

Previous Prime: 509

Next Prime: 521

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 2 × 7 × 37

Divisors: 1, 2, 7, 14, 37, 74, 259, 518

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1000000110

Octal: 1006

Duodecimal: 372

Hexadecimal: 206

Square: 268324

Square Root: 22.759613353482084

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

Triangle T(n,k), 0 <= k <= n, read by rows, defined by: T(0,0)=1, T(n,k)=0 if n < k, T(n,k) = T(n-1,k-1) + T(n-1,k) + T(n-1,k+1). A64189

Untouchable numbers, also called nonaliquot numbers: impossible values for the sum of aliquot parts function (A001065). A5114

Write 1,2,... in a clockwise spiral; sequence gives numbers on positive·axis. A33951

Motzkin triangle, T, read by rows; T(0,0) = T(1,0) = T(1,1) = 1; for n >= 2, T(n,0) = 1, T(n,k) = T(n-1,k-2) + T(n-1,k-1) + T(n-1,k) for k = 1,2,...,n-1 and T(n,n) = T(n-1,n-2) + T(n-1,n-1). A26300

Number of representations of n as a sum of products of positive integers. 1 is not allowed as a factor, unless it is the only factor. Representations which differ only in the order of terms or factors are considered equivalent. A66739

Numbers k such that Bernoulli number B_k has denominator 6. A51222

Number of partition into distinct parts (a₁, a₂, ... , a_m) (a₁ > a₂ > ... > a_m and ∑_k=1..m a_k = n) such that a1 - a2, a2 - a₃, ... , a_m-1 - a_m, a_m are different. A320348

a(n) = a(n-1) + a(n-7), with a(i) = 1 for i = 0..6. A5709

Number of compositions (ordered partitions) of n where the gcd of the part sizes is not 1. A178472

Numbers that are the sum of 8 positive 4th powers. A3342