216,309

3 × 72103

Prime Factor Structure

Factorization String 3 × 72103

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Total Divisors 4

Divisor Sum (σ) 288,416

Proper Divisor Sum 72,107

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #216289 ← → #216317

1 3 72,103 216,309

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

216,309 648,928 324,464 162,232 81,116 40,558 20,279 60,838 30,419 91,258 45,629 136,888 68,444 34,222 17,111 51,334 25,667 77,002 38,501 115,504 57,752 28,876 14,438 7,219 21,658 10,829 32,488 16,244 8,122 4,061 12,184 6,092 3,046 1,523 4,570 2,285 6,856 3,428 1,714 857 2,572 1,286 643 1,930 965 2,896 1,448 724 362 181 544 272 136 68 34 17 52 26 13 40

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