Properties of the Number 5551

Five Thousand Five Hundred Fifty-One

Basics

Value: 5550 → 5551 → 5552

Parity: odd

Prime: No

Previous Prime: 5531

Next Prime: 5557

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 7 × 13 × 61

Divisors: 1, 7, 13, 61, 91, 427, 793, 5551

Polygonal

Triangular: No

Square: No

Pentagonal: Yes

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010110101111

Octal: 12657

Duodecimal: 3267

Hexadecimal: 15af

Square: 30813601

Square Root: 74.50503338701353

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) = 4·n² - 6·n + 3. A54569

Coordination sequence for 3D uniform tiling formed by stacking parallel layers of the 3⁴.6 2D tiling (cf. A250120). A299254

4-dimensional analog of centered polygonal numbers. A6325

Pseudoprimes to base 3. A5935

Number of solenoidal flows (flow in = flow out) in a 3 X 3 square array with integer velocities -n .. n. A68722

Generalized 19-gonal (or enneadecagonal) numbers: m*(17·m - 15)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303813

a(n) = n*(n + 1)*(5·n - 4)/2. A237616

Pentagonal numbers with odd index: a(n) = (2·n+1)*(3·n+1). A33570

a(1) = 1; a(n) is smallest number >= a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A33680

Numbers using only digits 1 and 5. A276037