Properties of the Number 9815

Nine Thousand Eight Hundred Fifteen

Basics

Value: 9814 → 9815 → 9816

Parity: odd

Prime: No

Previous Prime: 9811

Next Prime: 9817

Digit Sum: 23

Digital Root: 5

Palindrome: No

Factorization: 5 × 13 × 151

Divisors: 1, 5, 13, 65, 151, 755, 1963, 9815

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10011001010111

Octal: 23127

Duodecimal: 581B

Hexadecimal: 2657

Square: 96334225

Square Root: 99.0706818387761

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 (n+1)X(k+1) 0..2 arrays with the maximum plus the upper median plus the minimum minus the lower median of every 2X2 subblock equal. A237067

Number of perfect-powers·in the range 2ⁿ < x < 2ⁿ⁺¹. A377467

Numbers that are the sum of ten fourth powers in exactly nine ways. A345861

3rd-largest term in n-th row of Stern's diatomic triangle A002487. A244473

Number of minimal total dominating sets in the n-path graph. A302655

Fibonacci sequence beginning 5, 13. A22138

a(n) = n*(29·n + 1)/2. A22287

Number of self-avoiding paths with diagonal steps from corner to opposite corner of n X n grid. A38496

Numbers k such that A055079(k) = 2^k. A57838

Positive integers i for which A112049(i) == 8. A112068