3 × 7 × 61 × 173

Prime Factor Structure

Factorization String 3 × 7 × 61 × 173

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 345,216

Proper Divisor Sum 123,603

Digit Sum / Digital Root 15 (Root: 6)

Adjacent Primes #221603 ← → #221621

1 3 7 21 61 173 183 427 519 1,211 1,281 3,633 10,553 31,659 73,871 221,613

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

221,613 664,840 332,420 166,210 83,105 249,316 124,658 62,329 186,988 93,494 46,747 140,242 70,121 210,364 105,182 52,591 157,774 78,887 236,662 118,331 354,994 177,497 532,492 266,246 133,123 399,370 199,685 599,056 299,528 149,764 74,882 37,441 112,324 56,162 28,081 84,244 42,122 21,061 63,184 31,592 15,796 7,898 3,949 11,848 5,924 2,962 1,481 4,444 2,222 1,111 3,334 1,667 5,002 2,501 7,504 3,752 1,876 938 469 1,408

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