31,121,981

11 × 19 × 43 × 3463

Prime Factor Structure

Factorization String 11 × 19 × 43 × 3463

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 36,579,840

Proper Divisor Sum 5,457,859

Digit Sum / Digital Root 26 (Root: 8)

Adjacent Primes #31121977 ← → #31121983

1 11 19 43 209 473 817 3,463 8,987 38,093 65,797 148,909 723,767 1,637,999 2,829,271 31,121,981

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

31,121,981 93,365,944 46,682,972 23,341,486 11,670,743 35,012,230 17,506,115 52,518,346 26,259,173 78,777,520 39,388,760 19,694,380 9,847,190 4,923,595 14,770,786 7,385,393 22,156,180 11,078,090 5,539,045 16,617,136 8,308,568 4,154,284 2,077,142 1,038,571 3,115,714 1,557,857 4,673,572 2,336,786 1,168,393 3,505,180 1,752,590 876,295 2,628,886 1,314,443 3,943,330 1,971,665 5,914,996 2,957,498 1,478,749 4,436,248 2,218,124 1,109,062 554,531 1,663,594 831,797 2,495,392 1,247,696 623,848 311,924 155,962 77,981 233,944 116,972 58,486 29,243 87,730 43,865 131,596 65,798 32,899

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