521 × 1229

Prime Factor Structure

Factorization String 521 × 1229

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 642,060

Proper Divisor Sum 1,751

Digit Sum / Digital Root 22 (Root: 4)

Adjacent Primes #640307 ← → #640333

1 521 1,229 640,309

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

640,309 1,920,928 960,464 480,232 240,116 120,058 60,029 180,088 90,044 45,022 22,511 67,534 33,767 101,302 50,651 151,954 75,977 227,932 113,966 56,983 170,950 85,475 256,426 128,213 384,640 192,320 96,160 48,080 24,040 12,020 6,010 3,005 9,016 4,508 2,254 1,127 3,382 1,691 5,074 2,537 7,612 3,806 1,903 5,710 2,855 8,566 4,283 12,850 6,425 19,276 9,638 4,819 14,458 7,229 21,688 10,844 5,422 2,711 8,134 4,067

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