Properties of the Number 33861

Thirty-Three Thousand Eight Hundred Sixty-One

Basics

Value: 33860 → 33861 → 33862

Parity: odd

Prime: No

Previous Prime: 33857

Next Prime: 33863

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 11287

Divisors: 1, 3, 11287, 33861

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1000010001000101

Octal: 102105

Duodecimal: 17719

Hexadecimal: 8445

Square: 1146567321

Square Root: 184.0135864549137

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

Expansion of (3·x² + 244·x + 1)/(x³ - 99·x² + 99·x - 1). A269554

Antidiagonal sums of triangular array T: T(j,1) = 1 for ((j-1) mod 6) < 3, else 0; T(j,k) = T(j-1,k-1) + T(j-1,k) for 2 <= k <= j. A131025

Number of triangles, distinct up to congruence, on a centered hexagonal grid of size n. A241231

Triangle read by rows: T(n,k) = 1 + (q-binomial coefficient [n,k] for q=3) - binomial(n,k). A176421

Centered truncated octahedral numbers: the number of integer triples (x,y,z) such that max(|x|,|y|,|z|) <= 2n and |x|+|y|+|z| <= 3n. A371515

Number of permutations satisfying -k<=p(i)-i<=r and p(i)-i not in I, i=1..n, with k=2, r=3, I={0,2}. A80006

Indices of primes occurring in A030284. A107365

Number of nX4 0..1 arrays with every element equal to 0, 1, 3 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero. A300502

E.g.f. A(x) satisfies A(x) = 1/( 1 - A(x) * sinh(x·A(x)) ). A381177

Sort-then-add sequence: a(1) = 316, a(n+1) = a(n) + sort(a(n)). A33861