3² × 5 × 23 × 211

Prime Factor Structure

Factorization String 3^2 × 5 × 23 × 211

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 396,864

Proper Divisor Sum 178,479

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #218381 ← → #218389

1 3 5 9 15 23 45 69 115 207 211 345 633 1,035 1,055 1,899 3,165 4,853 9,495 14,559 24,265 43,677 72,795 218,385

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

218,385 655,156 327,578 163,789 491,368 245,684 122,842 61,421 184,264 92,132 46,066 23,033 69,100 34,550 17,275 51,826 25,913 77,740 38,870 19,435 58,306 29,153 87,460 43,730 21,865 65,596 32,798 16,399 49,198 24,599 73,798 36,899 110,698 55,349 166,048 83,024 41,512 20,756 10,378 5,189 15,568 7,784 3,892 1,946 973 2,920 1,460 730 365 1,096 548 274 137 412 206 103 310 155 466 233

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