Properties of the Number 90219

Ninety Thousand Two Hundred Nineteen

Basics

Value: 90218 → 90219 → 90220

Parity: odd

Prime: No

Previous Prime: 90217

Next Prime: 90227

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 17 × 29 × 61

Divisors: 1, 3, 17, 29, 51, 61, 87, 183, 493, 1037

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 10110000001101011

Octal: 260153

Duodecimal: 44263

Hexadecimal: 1606b

Square: 8139467961

Square Root: 300.3647782280739

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

a(n) = n*(n+5)*(50+45·n+n²)/24. A101861

Triangle T(n,k), 0 <= k <= n, read by rows, giving coefficients of the polynomial (x+1)(x+2)...(x+n), expanded in increasing powers of x. T(n,k) is also the unsigned Stirling number |s(n+1, k+1)|, denoting the number of permutations on n+1 elements that contain exactly k+1 cycles. A130534

Triangle read by rows: the unsigned Lah numbers T(n, k) = binomial(n-1, k-1)*n!/k! if n > 0 and k > 0, T(n, 0) = 0ⁿ and otherwise 0, for n >= 0 and 0 <= k <= n. A271703

Signed triangle used to compute column sequences of array A078741 ((3,3)-Stirling2). A90219