7² × 11 × 13 × 31

Prime Factor Structure

Factorization String 7^2 × 11 × 13 × 31

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 24

Divisor Sum (σ) 306,432

Proper Divisor Sum 89,215

Digit Sum / Digital Root 20 (Root: 2)

Adjacent Primes #217207 ← → #217219

1 7 11 13 31 49 77 91 143 217 341 403 539 637 1,001 1,519 2,387 2,821 4,433 7,007 16,709 19,747 31,031 217,217

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

217,217 651,652 325,826 162,913 488,740 244,370 122,185 366,556 183,278 91,639 274,918 137,459 412,378 206,189 618,568 309,284 154,642 77,321 231,964 115,982 57,991 173,974 86,987 260,962 130,481 391,444 195,722 97,861 293,584 146,792 73,396 36,698 18,349 55,048 27,524 13,762 6,881 20,644 10,322 5,161 15,484 7,742 3,871 11,614 5,807 17,422 8,711 26,134 13,067 39,202 19,601 58,804 29,402 14,701 44,104 22,052 11,026 5,513 16,540 8,270

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