3⁵ × 5 × 17 × 31

Prime Factor Structure

Factorization String 3^5 × 5 × 17 × 31

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 48

Divisor Sum (σ) 1,257,984

Proper Divisor Sum 617,679

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #640303 ← → #640307

1 3 5 9 15 17 27 31 45 51 81 85 93 135 153 155 243 255 279 405 459 465 527 765 837 1,215 1,377 1,395 1,581 2,295 2,511 2,635 4,131 4,185 4,743 6,885 7,533 7,905 12,555 14,229 20,655 23,715 37,665 42,687 71,145 128,061 213,435 640,305

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

640,305 1,920,916 960,458 480,229 1,440,688 720,344 360,172 180,086 90,043 270,130 135,065 405,196 202,598 101,299 303,898 151,949 455,848 227,924 113,962 56,981 170,944 85,472 42,736 21,368 10,684 5,342 2,671 8,014 4,007 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.