Properties of the Number 16881

Sixteen Thousand Eight Hundred Eighty-One

Basics

Value: 16880 → 16881 → 16882

Parity: odd

Prime: No

Previous Prime: 16879

Next Prime: 16883

Digit Sum: 24

Digital Root: 6

Palindrome: No

Factorization: 3 × 17 × 331

Divisors: 1, 3, 17, 51, 331, 993, 5627, 16881

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 100000111110001

Octal: 40761

Duodecimal: 9929

Hexadecimal: 41f1

Square: 284968161

Square Root: 129.9269025259973

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

Tribonacci-like sequence; a(0)=2, a(1)=1, a(2)=1, a(n) = a(n-1) + a(n-2) + a(n-3). A141036

a(n) = T(4,n), array T given by A048505. A48509

Structured heptagonal anti-diamond numbers (vertex structure 7). A100186

The sum of the sizes of the minimal fixed points over all compositions of n. A335712

a(n) = ∑_k=2..n binomial(k,2) * floor(n/k). A366967

a(n+3) = a(n) - a(n+1) - a(n+2); a(0) = -5, a(1) = 6, a(2) = 0. A105580

Number of length n+6 0..1 arrays with at most one downstep in every n consecutive neighbor pairs. A255997

Number of partitions of n with equal nonzero number of parts congruent to each of 0 and 1 (mod 3). A35537

Distinct odd numbers in the numerators of the 1/5-Pascal triangle (by row). A46624

Distinct odd numbers in writing first numerator and then denominator of each element to the right of the central elements of the 1/5-Pascal triangle (by row). A46628