5² × 13 × 643

Prime Factor Structure

Factorization String 5^2 × 13 × 643

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 279,496

Proper Divisor Sum 70,521

Digit Sum / Digital Root 31 (Root: 4)

Adjacent Primes #208963 ← → #208991

1 5 13 25 65 325 643 3,215 8,359 16,075 41,795 208,975

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

208,975 626,926 313,463 940,390 470,195 1,410,586 705,293 2,115,880 1,057,940 528,970 264,485 793,456 396,728 198,364 99,182 49,591 148,774 74,387 223,162 111,581 334,744 167,372 83,686 41,843 125,530 62,765 188,296 94,148 47,074 23,537 70,612 35,306 17,653 52,960 26,480 13,240 6,620 3,310 1,655 4,966 2,483 7,450 3,725 11,176 5,588 2,794 1,397 4,192 2,096 1,048 524 262 131 394 197 592 296 148 74 37

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