λ
Sequence Observatory

6,218,681

7 × 19 × 46757
Deficient Odd Composite

Starting at 6,218,681, the Collatz iteration reaches 1 after 289 steps. The first transition is 18656044; the starting value is odd with 8 positive divisors.

Prime Factor Structure

Factorization String 7 × 19 × 46757
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 7,481,280
Proper Divisor Sum 1,262,599
Digit Sum / Digital Root 32 (Root: 5)
Adjacent Primes #6218669 ← → #6218683

Radix Representation

Decimal 6218681
Binary 10111101110001110111001 (23 bits)
Octal 0o27561671
Hexadecimal 0x5EE3B9

Divisor Catalog (8)

1 7 19 133 46,757 327,299 888,383 6,218,681

Collatz Trajectory (289 steps to reach 1)

Iterative sequence n → n/2 (if even) or 3n+1 (if odd):

6,218,681 18,656,044 9,328,022 4,664,011 13,992,034 6,996,017 20,988,052 10,494,026 5,247,013 15,741,040 7,870,520 3,935,260 1,967,630 983,815 2,951,446 1,475,723 4,427,170 2,213,585 6,640,756 3,320,378 1,660,189 4,980,568 2,490,284 1,245,142 622,571 1,867,714 933,857 2,801,572 1,400,786 700,393 2,101,180 1,050,590 525,295 1,575,886 787,943 2,363,830 1,181,915 3,545,746 1,772,873 5,318,620 2,659,310 1,329,655 3,988,966 1,994,483 5,983,450 2,991,725 8,975,176 4,487,588 2,243,794 1,121,897 3,365,692 1,682,846 841,423 2,524,270 1,262,135 3,786,406 1,893,203 5,679,610 2,839,805 8,519,416

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