3² × 5 × 11 × 43

Prime Factor Structure

Factorization String 3^2 × 5 × 11 × 43

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 41,184

Proper Divisor Sum 19,899

Digit Sum / Digital Root 18 (Root: 9)

Adjacent Primes #21283 ← → #21313

1 3 5 9 11 15 33 43 45 55 99 129 165 215 387 473 495 645 1,419 1,935 2,365 4,257 7,095 21,285

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

21,285 63,856 31,928 15,964 7,982 3,991 11,974 5,987 17,962 8,981 26,944 13,472 6,736 3,368 1,684 842 421 1,264 632 316 158 79 238 119 358 179 538 269 808 404 202 101 304 152 76 38 19 58 29 88 44 22 11 34 17 52 26 13 40 20 10 5 16 8 4 2 1

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