5 × 31 × 137

Prime Factor Structure

Factorization String 5 × 31 × 137

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 8

Divisor Sum (σ) 26,496

Proper Divisor Sum 5,261

Digit Sum / Digital Root 13 (Root: 4)

Adjacent Primes #21227 ← → #21247

1 5 31 137 155 685 4,247 21,235

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

21,235 63,706 31,853 95,560 47,780 23,890 11,945 35,836 17,918 8,959 26,878 13,439 40,318 20,159 60,478 30,239 90,718 45,359 136,078 68,039 204,118 102,059 306,178 153,089 459,268 229,634 114,817 344,452 172,226 86,113 258,340 129,170 64,585 193,756 96,878 48,439 145,318 72,659 217,978 108,989 326,968 163,484 81,742 40,871 122,614 61,307 183,922 91,961 275,884 137,942 68,971 206,914 103,457 310,372 155,186 77,593 232,780 116,390 58,195 174,586

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