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Properties of the Number 5581

Five Thousand Five Hundred Eighty-One

Basics

Value: 5580 → 5581 → 5582

Parity: odd

Prime: Yes

Previous Prime: 5573

Next Prime: 5591

Digit Sum: 19

Digital Root: 1

Palindrome: No

Factorization: 5581

Divisors: 1, 5581

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010111001101

Octal: 12715

Duodecimal: 3291

Hexadecimal: 15cd

Square: 31147561

Square Root: 74.70609078247904

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

Centered 12-gonal numbers, or centered dodecagonal numbers: numbers of the form 6·k*(k-1) + 1. A3154
Primes congruent to 1 mod 31. A142005
Lower prime of a difference of 10 between consecutive primes. A31928
Triangle read by rows: row n is the first row of the matrix M[n]n-1, where M[n] is the n X n tridiagonal matrix with main diagonal (1,4,4,...) and super- and subdiagonals (1,1,1,...). A124576
Value of D for incrementally largest values of minimal·satisfying Pell equation x2-Dy2=1. A33316
Primes p such that (p+4)/5 is also prime. A136061
Mother primes of order 7. A136066
Primes p such that (p+1)/2 and (p+2)/3 are also primes. A36570
Primes of the form 2·n2 + 70·n + 33. A217499
Smallest odd prime p such that n = (p - 1) / ordp(2). A101208