21391213

Prime Factor Structure

Factorization String 21391213

Distinct Prime Factors 1

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 2

Divisor Sum (σ) 21,391,214

Proper Divisor Sum 1

Digit Sum / Digital Root 22 (Root: 4)

Adjacent Primes #21391211 ← → #21391259

1 21,391,213

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

21,391,213 64,173,640 32,086,820 16,043,410 8,021,705 24,065,116 12,032,558 6,016,279 18,048,838 9,024,419 27,073,258 13,536,629 40,609,888 20,304,944 10,152,472 5,076,236 2,538,118 1,269,059 3,807,178 1,903,589 5,710,768 2,855,384 1,427,692 713,846 356,923 1,070,770 535,385 1,606,156 803,078 401,539 1,204,618 602,309 1,806,928 903,464 451,732 225,866 112,933 338,800 169,400 84,700 42,350 21,175 63,526 31,763 95,290 47,645 142,936 71,468 35,734 17,867 53,602 26,801 80,404 40,202 20,101 60,304 30,152 15,076 7,538 3,769

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