Properties of the Number 2643

Two Thousand Six Hundred Forty-Three

Basics

Value: 2642 → 2643 → 2644

Parity: odd

Prime: No

Previous Prime: 2633

Next Prime: 2647

Digit Sum: 15

Digital Root: 6

Palindrome: No

Factorization: 3 × 881

Divisors: 1, 3, 881, 2643

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101001010011

Octal: 5123

Duodecimal: 1643

Hexadecimal: a53

Square: 6985449

Square Root: 51.41011573610781

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 partitions of n into relatively prime parts that are all greater than 1. A302698

Number of integer partitions of n with integer reverse-alternating product. A347445

Numbers such that floor(a(n)² / 6) is a square. A204518

Number of odd-length integer partitions of n with integer alternating product. A347444

a(1) = 6; a(n) is smallest number > a(n-1) such that the juxtaposition a(1)a(2)...a(n) is a prime. A74342

Numbers k such that lcm(1,2,3,...,k)/5 equals the denominator of the k-th harmonic number H(k). A112814

Triangle read by rows where T(n,k) is the number of unlabeled connected multigraphs with loops with n edges and k vertices. A322115

Sum of the largest parts of the partitions of n into 10 squarefree parts. A326637

Numbers k such that k⁶⁴+(k+1)⁶⁴ is a prime. A174157

T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7. A252457