Properties of the Number 67215

Sixty-Seven Thousand Two Hundred Fifteen

Basics

Value: 67214 → 67215 → 67216

Parity: odd

Prime: No

Previous Prime: 67213

Next Prime: 67217

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 4481

Divisors: 1, 3, 5, 15, 4481, 13443, 22405, 67215

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 10000011010001111

Octal: 203217

Duodecimal: 32A93

Hexadecimal: 1068f

Square: 4517856225

Square Root: 259.2585582001103

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 nXk 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s. A297544

Numbers k such that k-4, k-2, k+2 and k+4 are prime. A173037

Numbers n such that n+/-2 and n²+/-2 are all primes. A189051

Numbers k such that {k + 2, k + 4} and {k² + 2, k² + 4} are both twin prime pairs. A284014

Number of nX4 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s. A297540

Number of 7Xn 0..1 arrays with every 1 horizontally, diagonally or antidiagonally adjacent to 2 or 3 neighboring 1s. A297550

Number of n X n 0..7 matrices with all row and column sums equal. A67215

Number of 6Xn 0..1 arrays avoiding 0 0 0 and 1 0 1 horizontally and 0 0 1 and 1 1 1 vertically. A207686