Properties of the Number 5545

Five Thousand Five Hundred Forty-Five

Basics

Value: 5544 → 5545 → 5546

Parity: odd

Prime: No

Previous Prime: 5531

Next Prime: 5557

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5 × 1109

Divisors: 1, 5, 1109, 5545

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010110101001

Octal: 12651

Duodecimal: 3261

Hexadecimal: 15a9

Square: 30747025

Square Root: 74.46475676452586

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

Triangle of Mahonian numbers T(n,k): coefficients in expansion of ∏_i=0..n-1 (1 + x + ... + xⁱ), where k ranges from 0 to A000217(n-1). Also enumerates permutations by their major index. A8302

Euler transform of A000292. A335

Fibonacci sequence beginning 1, 5. A22095

Centered 24-gonal numbers. A69190

If F(n) is the n-th Fibonacci number, then a(2n) = (F(2n+1) + F(n+2))/2 and a(2n+1) = (F(2n+2) + F(n+1))/2. A1224

a(n) = 3·n² - 2. A100536

Number of integer partitions of n such that (maximum) <= 2*(median). A361848

Numbers which have only digits 4 and 5 in base 10. A256290

a(n) = n-th concentric 12-gonal number. A195143

T(n,k)=Number of (n+1)X(k+1) arrays of permutations of 0..(n+1)*(k+1)-1 with each element having directed index change -2,-2 -1,0 0,1 or 1,0. A264534