3 × 213481

Prime Factor Structure

Factorization String 3 × 213481

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 853,928

Proper Divisor Sum 213,485

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #640421 ← → #640457

1 3 213,481 640,443

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

640,443 1,921,330 960,665 2,881,996 1,440,998 720,499 2,161,498 1,080,749 3,242,248 1,621,124 810,562 405,281 1,215,844 607,922 303,961 911,884 455,942 227,971 683,914 341,957 1,025,872 512,936 256,468 128,234 64,117 192,352 96,176 48,088 24,044 12,022 6,011 18,034 9,017 27,052 13,526 6,763 20,290 10,145 30,436 15,218 7,609 22,828 11,414 5,707 17,122 8,561 25,684 12,842 6,421 19,264 9,632 4,816 2,408 1,204 602 301 904 452 226 113

Other feeder batches with open delivery windows. Each feeder keeps its own target batch.