Properties of the Number 6555

Six Thousand Five Hundred Fifty-Five

Basics

Value: 6554 → 6555 → 6556

Parity: odd

Prime: No

Previous Prime: 6553

Next Prime: 6563

Digit Sum: 21

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 19 × 23

Divisors: 1, 3, 5, 15, 19, 23, 57, 69, 95, 115

Polygonal

Triangular: Yes

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 1100110011011

Octal: 14633

Duodecimal: 3963

Hexadecimal: 199b

Square: 42968025

Square Root: 80.96295449154508

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

Number of integer compositions of n with all distinct first sums. A390567

Number of partitions of n such that the least part occurs at least twice. A117989

Staggered diagonal of triangular spiral in A051682. A81266

Number of integer partitions of n whose median appears more times than any other part, i.e., partitions containing a unique mode equal to the median. A363740

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

17-gonal (or heptadecagonal) numbers: a(n) = n*(15·n-13)/2. A51869

a(n) = (2·n-1)*(4·n-1). A33567

Completely multiplicative function with a(prime(k)) = prime(k)*prime(k+1). A191002

Numbers divisible by prime(d) for each digit d in their base-9 representation, none of which may be zero. A256879

Triangular numbers that contain exactly 2 different digits. A62691