3² × 43 × 53

Prime Factor Structure

Factorization String 3^2 × 43 × 53

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 30,888

Proper Divisor Sum 10,377

Digit Sum / Digital Root 9 (Root: 9)

Adjacent Primes #20509 ← → #20521

1 3 9 43 53 129 159 387 477 2,279 6,837 20,511

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

20,511 61,534 30,767 92,302 46,151 138,454 69,227 207,682 103,841 311,524 155,762 77,881 233,644 116,822 58,411 175,234 87,617 262,852 131,426 65,713 197,140 98,570 49,285 147,856 73,928 36,964 18,482 9,241 27,724 13,862 6,931 20,794 10,397 31,192 15,596 7,798 3,899 11,698 5,849 17,548 8,774 4,387 13,162 6,581 19,744 9,872 4,936 2,468 1,234 617 1,852 926 463 1,390 695 2,086 1,043 3,130 1,565 4,696

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