Properties of the Number 66213

Sixty-Six Thousand Two Hundred Thirteen

Basics

Value: 66212 → 66213 → 66214

Parity: odd

Prime: No

Previous Prime: 66191

Next Prime: 66221

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ² × 7 × 1051

Divisors: 1, 3, 7, 9, 21, 63, 1051, 3153, 7357, 9459

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000001010100101

Octal: 201245

Duodecimal: 32399

Hexadecimal: 102a5

Square: 4384161369

Square Root: 257.31886833265844

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

Number of nX4 0..1 arrays with exactly floor(nX4/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order. A222324

Number of walks within N³ (the first octant of Z³) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, 0), (-1, 1, 1), (1, 0, 0), (1, 1, -1), (1, 1, 1)}. A150824

T(n,k)=Number of nXk 0..1 arrays with exactly floor(nXk/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..1 order. A222328

Numbers which are sums of squares of some subset of divisors. A66213