3 × 213557

Prime Factor Structure

Factorization String 3 × 213557

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 854,232

Proper Divisor Sum 213,561

Digit Sum / Digital Root 24 (Root: 6)

Adjacent Primes #640669 ← → #640687

1 3 213,557 640,671

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

640,671 1,922,014 961,007 2,883,022 1,441,511 4,324,534 2,162,267 6,486,802 3,243,401 9,730,204 4,865,102 2,432,551 7,297,654 3,648,827 10,946,482 5,473,241 16,419,724 8,209,862 4,104,931 12,314,794 6,157,397 18,472,192 9,236,096 4,618,048 2,309,024 1,154,512 577,256 288,628 144,314 72,157 216,472 108,236 54,118 27,059 81,178 40,589 121,768 60,884 30,442 15,221 45,664 22,832 11,416 5,708 2,854 1,427 4,282 2,141 6,424 3,212 1,606 803 2,410 1,205 3,616 1,808 904 452 226 113

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