Properties of the Number 5555

Five Thousand Five Hundred Fifty-Five

Basics

Value: 5554 → 5555 → 5556

Parity: odd

Prime: No

Previous Prime: 5531

Next Prime: 5557

Digit Sum: 20

Digital Root: 2

Palindrome: Yes

Factorization: 5 × 11 × 101

Divisors: 1, 5, 11, 55, 101, 505, 1111, 5555

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1010110110011

Octal: 12663

Duodecimal: 326B

Hexadecimal: 15b3

Square: 30858025

Square Root: 74.53187237685633

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

Repdigit numbers, or numbers whose digits are all equal. A10785

a(n) = 5*(10ⁿ - 1)/9. A2279

Numbers that are the sum of 4 positive 6th powers. A3360

Numbers m such that there are precisely 7 groups of order m. A249550

Numbers whose decimal expansion contains only 0's and 5's. A169964

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

Numbers which have only digits 5 and 6 in base 10. A256291

Numbers using only digits 1 and 5. A276037

Numbers which are divisible by prime(d) for all digits d in their decimal representation. A256786

Square array, read by antidiagonals, where row n+1 is generated from row n by first removing terms in row n at positions {floor(m*(m+7)/6), m>=0} and then taking partial sums, starting with all 1's in row 0. A136217