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Properties of the Number 16218

Sixteen Thousand Two Hundred Eighteen

Basics

Value: 16217 → 16218 → 16219

Parity: even

Prime: No

Previous Prime: 16217

Next Prime: 16223

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 2 × 3 2 × 17 × 53

Divisors: 1, 2, 3, 6, 9, 17, 18, 34, 51, 53

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

603 Try Today's Challenge

Representations

Binary: 11111101011010

Octal: 37532

Duodecimal: 9476

Hexadecimal: 3f5a

Square: 263023524

Square Root: 127.34991166074674

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

T(n,k)=Number of length-n 0..k arrays with no repeated value differing from the previous repeated value by other than plus two, zero or minus 1. A269619
a(n) = a(n-1) + ∑0<k<=n/5 a(n-5k) with a(0)=1. A113444
Numbers k for which digitsum(k) + digitsum(k2) + digitsum(k3) = digitsum(k4). A118470
Number of length-n 0..6 arrays with no repeated value differing from the previous repeated value by other than plus two, zero or minus 1. A269617
Number of length-5 0..n arrays with no repeated value differing from the previous repeated value by other than plus two, zero or minus 1. A269621
Sum of values of vertices of type B at level n of the hyperbolic Pascal pyramid. A292296
Numbers m such that m is k*(the sum of decimal digits squared of m), k=153 case. A117810
Numbers k such that (47·10k + 133)/9 is prime. A285379
Expansion of 1/((1-x)*(1-4·x)*(1-5·x)). A16218
Iterated partial sums of Euler totient function (A000010). Square array read by descending antidiagonals. A370075