3² × 5² × 7 × 139

Prime Factor Structure

Factorization String 3^2 × 5^2 × 7 × 139

Distinct Prime Factors 4

Square Status No

Abundance Measure Abundant

Analytical Properties

Total Divisors 36

Divisor Sum (σ) 451,360

Proper Divisor Sum 232,435

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #218923 ← → #218941

1 3 5 7 9 15 21 25 35 45 63 75 105 139 175 225 315 417 525 695 973 1,251 1,575 2,085 2,919 3,475 4,865 6,255 8,757 10,425 14,595 24,325 31,275 43,785 72,975 218,925

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

218,925 656,776 328,388 164,194 82,097 246,292 123,146 61,573 184,720 92,360 46,180 23,090 11,545 34,636 17,318 8,659 25,978 12,989 38,968 19,484 9,742 4,871 14,614 7,307 21,922 10,961 32,884 16,442 8,221 24,664 12,332 6,166 3,083 9,250 4,625 13,876 6,938 3,469 10,408 5,204 2,602 1,301 3,904 1,952 976 488 244 122 61 184 92 46 23 70 35 106 53 160 80 40

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