3 × 5² × 13 × 223

Prime Factor Structure

Factorization String 3 × 5^2 × 13 × 223

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 388,864

Proper Divisor Sum 171,439

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #217421 ← → #217429

1 3 5 13 15 25 39 65 75 195 223 325 669 975 1,115 2,899 3,345 5,575 8,697 14,495 16,725 43,485 72,475 217,425

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

217,425 652,276 326,138 163,069 489,208 244,604 122,302 61,151 183,454 91,727 275,182 137,591 412,774 206,387 619,162 309,581 928,744 464,372 232,186 116,093 348,280 174,140 87,070 43,535 130,606 65,303 195,910 97,955 293,866 146,933 440,800 220,400 110,200 55,100 27,550 13,775 41,326 20,663 61,990 30,995 92,986 46,493 139,480 69,740 34,870 17,435 52,306 26,153 78,460 39,230 19,615 58,846 29,423 88,270 44,135 132,406 66,203 198,610 99,305 297,916

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