3² × 5² × 71

Prime Factor Structure

Factorization String 3^2 × 5^2 × 71

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 18

Divisor Sum (σ) 29,016

Proper Divisor Sum 13,041

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #15973 ← → #15991

1 3 5 9 15 25 45 71 75 213 225 355 639 1,065 1,775 3,195 5,325 15,975

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

15,975 47,926 23,963 71,890 35,945 107,836 53,918 26,959 80,878 40,439 121,318 60,659 181,978 90,989 272,968 136,484 68,242 34,121 102,364 51,182 25,591 76,774 38,387 115,162 57,581 172,744 86,372 43,186 21,593 64,780 32,390 16,195 48,586 24,293 72,880 36,440 18,220 9,110 4,555 13,666 6,833 20,500 10,250 5,125 15,376 7,688 3,844 1,922 961 2,884 1,442 721 2,164 1,082 541 1,624 812 406 203 610

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