3 × 7 × 31 × 331

Prime Factor Structure

Factorization String 3 × 7 × 31 × 331

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 339,968

Proper Divisor Sum 124,487

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #215471 ← → #215483

1 3 7 21 31 93 217 331 651 993 2,317 6,951 10,261 30,783 71,827 215,481

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

215,481 646,444 323,222 161,611 484,834 242,417 727,252 363,626 181,813 545,440 272,720 136,360 68,180 34,090 17,045 51,136 25,568 12,784 6,392 3,196 1,598 799 2,398 1,199 3,598 1,799 5,398 2,699 8,098 4,049 12,148 6,074 3,037 9,112 4,556 2,278 1,139 3,418 1,709 5,128 2,564 1,282 641 1,924 962 481 1,444 722 361 1,084 542 271 814 407 1,222 611 1,834 917 2,752 1,376

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