Properties of the Number 55986

Fifty-Five Thousand Nine Hundred Eighty-Six

Basics

Value: 55985 → 55986 → 55987

Parity: even

Prime: No

Previous Prime: 55967

Next Prime: 55987

Digit Sum: 33

Digital Root: 6

Palindrome: No

Factorization: 2 × 3 × 7 × 31 × 43

Divisors: 1, 2, 3, 6, 7, 14, 21, 31, 42, 43

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1101101010110010

Octal: 155262

Duodecimal: 28496

Hexadecimal: dab2

Square: 3134432196

Square Root: 236.61360907606309

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

Numbers k such that k² divides 5^k-1. A127105

a(n) = ∑_k=1..n n^k. A31972

Triangle by rows T(n,k), showing the number of meanders with length (n+1)*6 and containing (k+1)*6 Ls and (n-k)*6 Rs, where Ls and Rs denote arcs of equal length and a central angle of 60 degrees which are positively or negatively oriented. A197655

a(n) = A273059(4n). A275916

Numbers k such that ω(k) = 5 and the largest prime factor of k equals the sum of its remaining distinct prime factors, where ω(k) = A001221(k). A383729

a(0)=0; a(n) = 6·a(n-1) + 6. A105281

a(n) = n⁶ + n⁵ + n⁴ + n³ + n² + n. A228290

Numbers n such that sum of distinct primes dividing n is divisible by the largest prime dividing n. Also n has exactly 5 distinct prime factors and n is squarefree. A71144

a(n) is the number of 5 element sets of distinct integer-sided trapezoids each of area less than 3·n² whose base angles are 60 degrees that fill a regular hexagon of side n units. A390763

A(n,k) = ∑_i=1..k nⁱ; square array A(n,k), n>=0, k>=0, read by antidiagonals. A228275