3² × 5 × 7 × 691

Prime Factor Structure

Factorization String 3^2 × 5 × 7 × 691

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 431,808

Proper Divisor Sum 214,143

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #217661 ← → #217667

1 3 5 7 9 15 21 35 45 63 105 315 691 2,073 3,455 4,837 6,219 10,365 14,511 24,185 31,095 43,533 72,555 217,665

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

217,665 652,996 326,498 163,249 489,748 244,874 122,437 367,312 183,656 91,828 45,914 22,957 68,872 34,436 17,218 8,609 25,828 12,914 6,457 19,372 9,686 4,843 14,530 7,265 21,796 10,898 5,449 16,348 8,174 4,087 12,262 6,131 18,394 9,197 27,592 13,796 6,898 3,449 10,348 5,174 2,587 7,762 3,881 11,644 5,822 2,911 8,734 4,367 13,102 6,551 19,654 9,827 29,482 14,741 44,224 22,112 11,056 5,528 2,764 1,382

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