5,565,561

3 × 1855187

Starting at 5,565,561, the Collatz iteration reaches 1 after 108 steps. The first transition is 16696684; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 3 × 1855187

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 7,420,752

Proper Divisor Sum 1,855,191

Digit Sum / Digital Root 33 (Root: 6)

Adjacent Primes #5565551 ← → #5565607

Radix Representation

Decimal	5565561
Binary	10101001110110001111001 (23 bits)
Octal	0o25166171
Hexadecimal	0x54EC79

Divisor Catalog (4)

1 3 1,855,187 5,565,561

Collatz Trajectory (108 steps to reach 1)

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

5,565,561 16,696,684 8,348,342 4,174,171 12,522,514 6,261,257 18,783,772 9,391,886 4,695,943 14,087,830 7,043,915 21,131,746 10,565,873 31,697,620 15,848,810 7,924,405 23,773,216 11,886,608 5,943,304 2,971,652 1,485,826 742,913 2,228,740 1,114,370 557,185 1,671,556 835,778 417,889 1,253,668 626,834 313,417 940,252 470,126 235,063 705,190 352,595 1,057,786 528,893 1,586,680 793,340 396,670 198,335 595,006 297,503 892,510 446,255 1,338,766 669,383 2,008,150 1,004,075 3,012,226 1,506,113 4,518,340 2,259,170 1,129,585 3,388,756 1,694,378 847,189 2,541,568 1,270,784

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