3² × 11 × 13 × 17

Prime Factor Structure

Factorization String 3^2 × 11 × 13 × 17

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 39,312

Proper Divisor Sum 17,433

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #21871 ← → #21881

1 3 9 11 13 17 33 39 51 99 117 143 153 187 221 429 561 663 1,287 1,683 1,989 2,431 7,293 21,879

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

21,879 65,638 32,819 98,458 49,229 147,688 73,844 36,922 18,461 55,384 27,692 13,846 6,923 20,770 10,385 31,156 15,578 7,789 23,368 11,684 5,842 2,921 8,764 4,382 2,191 6,574 3,287 9,862 4,931 14,794 7,397 22,192 11,096 5,548 2,774 1,387 4,162 2,081 6,244 3,122 1,561 4,684 2,342 1,171 3,514 1,757 5,272 2,636 1,318 659 1,978 989 2,968 1,484 742 371 1,114 557 1,672 836

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