6,218,121

3 × 7 × 13 × 22777

6,218,121 has digital root 3. The neighboring primes are 6218117 and 6218143; its proper-divisor sum differs from the starting integer by -2,231,698.

Prime Factor Structure

Factorization String 3 × 7 × 13 × 22777

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 10,204,544

Proper Divisor Sum 3,986,423

Digit Sum / Digital Root 21 (Root: 3)

Adjacent Primes #6218117 ← → #6218143

1 3 7 13 21 39 91 273 22,777 68,331 159,439 296,101 478,317 888,303 2,072,707 6,218,121

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

6,218,121 18,654,364 9,327,182 4,663,591 13,990,774 6,995,387 20,986,162 10,493,081 31,479,244 15,739,622 7,869,811 23,609,434 11,804,717 35,414,152 17,707,076 8,853,538 4,426,769 13,280,308 6,640,154 3,320,077 9,960,232 4,980,116 2,490,058 1,245,029 3,735,088 1,867,544 933,772 466,886 233,443 700,330 350,165 1,050,496 525,248 262,624 131,312 65,656 32,828 16,414 8,207 24,622 12,311 36,934 18,467 55,402 27,701 83,104 41,552 20,776 10,388 5,194 2,597 7,792 3,896 1,948 974 487 1,462 731 2,194 1,097

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