Properties of the Number 61181

Sixty-One Thousand One Hundred Eighty-One

Basics

Value: 61180 → 61181 → 61182

Parity: odd

Prime: No

Previous Prime: 61169

Next Prime: 61211

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 193 × 317

Divisors: 1, 193, 317, 61181

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1110111011111101

Octal: 167375

Duodecimal: 2B4A5

Hexadecimal: eefd

Square: 3743114761

Square Root: 247.34793308212625

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) = 2·a(n-1) + a(n-2); a(0)=1, a(1)=4. A48654

a(n) = 6·a(n-1) - a(n-2), n >= 2, a(0)=1, a(1)=9. A38761

2·a(n)² + 7 is a square. A77442

Start with the sequence S(0)={1,1} and for k>0 define S(k) to be I(S(k-1)) where I denotes the operation of inserting, for i=1,2,3..., the term a(i)+a(i+1) between any two terms for which 4a(i+1)<=5a(i). The listed terms are the initial terms of the limit of this process as k goes to infinity. A82981

a(n) = 2·a(n - 2) + a(n - 4) with a(0) = a(1) = 2, a(2) = 1, a(3) = 3. A266504

a(n) = 2·a(n-4) + a(n-8) for n >= 8. A266506

Numbers that are not the sum of distinct terms of A354005. A354007

a(2n) = A001542(n+1), a(2n+1) = A038761(n+1); a Pellian-related sequence. A129345

Third iteration of x·C(x) where C(x) is the Catalan function (A000108). A158826

Sixth column (m=5) of triangle A060920 (bisection of Fibonacci triangle, even part). A61181