Properties of the Number 5561

Five Thousand Five Hundred Sixty-One

Basics

Value: 5560 → 5561 → 5562

Parity: odd

Prime: No

Previous Prime: 5557

Next Prime: 5563

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 67 × 83

Divisors: 1, 67, 83, 5561

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010110111001

Octal: 12671

Duodecimal: 3275

Hexadecimal: 15b9

Square: 30924721

Square Root: 74.57211275000863

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) = ∑_{d divides n} d^{n/d + 1}. A78308

Numbers k giving rise to prime quadruples (30k+11, 30k+13, 30k+17, 30k+19). A14561

To get next term, multiply by 17, add 1 and discard any prime factors < 17. A57216

Riordan array ((1-2·x)/(1-3·x+x²), x/(1-3·x+x²)). A238731

Least sum of 3 distinct nonzero squares in exactly n ways. A25415

a(n) is the smallest number that is the sum of 3 nonzero squares in exactly n ways. A25414

Semiprimes whose prime factors are of equal binary length and which differ from each other in one bit position only. A261073

Factors k > 0 such that k·x² + 1 produces a new minimum of its Hardy-Littlewood constant. A331946

Sequence of pairwise relatively prime numbers of class P₇ (see comment in A275246). A275252

Addends k > 0 such that x² + k produces a new minimum of its Hardy-Littlewood Constant. A331949