Properties of the Number 8519

Eight Thousand Five Hundred Nineteen

Basics

Value: 8518 → 8519 → 8520

Parity: odd

Prime: No

Previous Prime: 8513

Next Prime: 8521

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 7 × 1217

Divisors: 1, 7, 1217, 8519

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

8509 Try Today's Challenge

Representations

Binary: 10000101000111

Octal: 20507

Duodecimal: 4B1B

Hexadecimal: 2147

Square: 72573361

Square Root: 92.29842902238369

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

Numbers k such that k!! + 2³ is prime. A76188

Numbers k > 1 such that, in base 4, k and k² contain the same digits in the same proportion. A61658

a(1) = 10; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A111524

a(1) = 1; thereafter a(n) is always the smallest integer > a(n-1) not leading to a contradiction, such that any four consecutive digits in the sequence sum up to a prime. A152604

Number of partitions of n into parts 3k or 3k+1. A35360

Number of partitions p of n such that the number of numbers having multiplicity 1 in p is not a part and the number of numbers having multiplicity > 1 is a part. A241415

a(n) = Least i in range [A165583(n),A165583(n+1)] for which abs(A165582(i)) gets the maximum value in that range. A165584

a(n) = a(n-1) + a(round(2*(n-1)/3)) + a(round((n-1)/3)) with a(1)=a(2)=1. A33499

Numbers k such that A055079(k) = 2^k. A57838

Hard numbers: a(n) = smallest positive number m with f(m) = n, where f(m) is the smallest number of digits that are needed to construct m using only 1's, 2's and any number of +, -, *, ^ signs, not allowing concatenation of the digits. A60274