644,522

2 × 322261

Starting at 644,522, the Collatz iteration reaches 1 after 141 steps. The first transition is 322261; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 322261

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 966,786

Proper Divisor Sum 322,264

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #644519 ← → #644531

Radix Representation

Decimal	644522
Binary	10011101010110101010 (20 bits)
Octal	0o2352652
Hexadecimal	0x9D5AA

Divisor Catalog (4)

1 2 322,261 644,522

Collatz Trajectory (141 steps to reach 1)

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

644,522 322,261 966,784 483,392 241,696 120,848 60,424 30,212 15,106 7,553 22,660 11,330 5,665 16,996 8,498 4,249 12,748 6,374 3,187 9,562 4,781 14,344 7,172 3,586 1,793 5,380 2,690 1,345 4,036 2,018 1,009 3,028 1,514 757 2,272 1,136 568 284 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412 206 103 310 155 466 233 700

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