3⁴ × 19 × 139

Prime Factor Structure

Factorization String 3^4 × 19 × 139

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 20

Divisor Sum (σ) 338,800

Proper Divisor Sum 124,879

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #213919 ← → #213929

1 3 9 19 27 57 81 139 171 417 513 1,251 1,539 2,641 3,753 7,923 11,259 23,769 71,307 213,921

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

213,921 641,764 320,882 160,441 481,324 240,662 120,331 360,994 180,497 541,492 270,746 135,373 406,120 203,060 101,530 50,765 152,296 76,148 38,074 19,037 57,112 28,556 14,278 7,139 21,418 10,709 32,128 16,064 8,032 4,016 2,008 1,004 502 251 754 377 1,132 566 283 850 425 1,276 638 319 958 479 1,438 719 2,158 1,079 3,238 1,619 4,858 2,429 7,288 3,644 1,822 911 2,734 1,367

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