Properties of the Number 16815

Sixteen Thousand Eight Hundred Fifteen

Basics

Value: 16814 → 16815 → 16816

Parity: odd

Prime: No

Previous Prime: 16811

Next Prime: 16823

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 19 × 59

Divisors: 1, 3, 5, 15, 19, 57, 59, 95, 177, 285

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000110101111

Octal: 40657

Duodecimal: 9893

Hexadecimal: 41af

Square: 282744225

Square Root: 129.67266481413884

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

Stirling numbers of the first kind: s(n+2, n). A914

Generalized Stirling number triangle of first kind read by rows: T(n, k) = [x^k] ∏_m=1..n (x - m - r), with r = 6. A51339

Numbers k such that σ(k) = σ(k+6). A15866

Polar structured meta-anti-diamond numbers, the n-th number from a polar structured n-gonal anti-diamond number sequence. A100188

T(n,k)=Number of nXk 0..2 arrays x(i,j) with each element horizontally or antidiagonally next to at least one element with value 2-x(i,j). A230184

Sums of distinct powers of 7. A33044

Digitally balanced numbers in base 4: equal numbers of 0's, 1's, ... 3's. A49355

Primitive elements of A119432. A119433

a(n) = n⁵ + n + 1. A271209

Numbers n such that n² = a² + b⁵ (with integers a, b > 0) and gcd(a, b, n) = 1. A293284