8,155,143

3² × 131 × 6917

8,155,143 has digital root 9. The neighboring primes are 8155141 and 8155171; its proper-divisor sum differs from the starting integer by -4,438,998.

Prime Factor Structure

Factorization String 3^2 × 131 × 6917

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 12

Divisor Sum (σ) 11,871,288

Proper Divisor Sum 3,716,145

Digit Sum / Digital Root 27 (Root: 9)

Adjacent Primes #8155141 ← → #8155171

1 3 9 131 393 1,179 6,917 20,751 62,253 906,127 2,718,381 8,155,143

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

8,155,143 24,465,430 12,232,715 36,698,146 18,349,073 55,047,220 27,523,610 13,761,805 41,285,416 20,642,708 10,321,354 5,160,677 15,482,032 7,741,016 3,870,508 1,935,254 967,627 2,902,882 1,451,441 4,354,324 2,177,162 1,088,581 3,265,744 1,632,872 816,436 408,218 204,109 612,328 306,164 153,082 76,541 229,624 114,812 57,406 28,703 86,110 43,055 129,166 64,583 193,750 96,875 290,626 145,313 435,940 217,970 108,985 326,956 163,478 81,739 245,218 122,609 367,828 183,914 91,957 275,872 137,936 68,968 34,484 17,242 8,621