216,381

3 × 11 × 79 × 83

Prime Factor Structure

Factorization String 3 × 11 × 79 × 83

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 322,560

Proper Divisor Sum 106,179

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #216379 ← → #216397

1 3 11 33 79 83 237 249 869 913 2,607 2,739 6,557 19,671 72,127 216,381

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

216,381 649,144 324,572 162,286 81,143 243,430 121,715 365,146 182,573 547,720 273,860 136,930 68,465 205,396 102,698 51,349 154,048 77,024 38,512 19,256 9,628 4,814 2,407 7,222 3,611 10,834 5,417 16,252 8,126 4,063 12,190 6,095 18,286 9,143 27,430 13,715 41,146 20,573 61,720 30,860 15,430 7,715 23,146 11,573 34,720 17,360 8,680 4,340 2,170 1,085 3,256 1,628 814 407 1,222 611 1,834 917 2,752 1,376

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