5² × 13 × 43 × 1531

Prime Factor Structure

Factorization String 5^2 × 13 × 43 × 1531

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 29,255,072

Proper Divisor Sum 7,859,347

Digit Sum / Digital Root 34 (Root: 7)

Adjacent Primes #21395723 ← → #21395747

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

21,395,725 64,187,176 32,093,588 16,046,794 8,023,397 24,070,192 12,035,096 6,017,548 3,008,774 1,504,387 4,513,162 2,256,581 6,769,744 3,384,872 1,692,436 846,218 423,109 1,269,328 634,664 317,332 158,666 79,333 238,000 119,000 59,500 29,750 14,875 44,626 22,313 66,940 33,470 16,735 50,206 25,103 75,310 37,655 112,966 56,483 169,450 84,725 254,176 127,088 63,544 31,772 15,886 7,943 23,830 11,915 35,746 17,873 53,620 26,810 13,405 40,216 20,108 10,054 5,027 15,082 7,541 22,624

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