220,504

2³ × 43 × 641

220,504 has digital root 4. The neighboring primes are 220471 and 220511; its proper-divisor sum differs from the starting integer by -17,288.

Prime Factor Structure

Factorization String 2^3 × 43 × 641

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Total Divisors 16

Divisor Sum (σ) 423,720

Proper Divisor Sum 203,216

Digit Sum / Digital Root 13 (Root: 4)

Adjacent Primes #220471 ← → #220511

1 2 4 8 43 86 172 344 641 1,282 2,564 5,128 27,563 55,126 110,252 220,504

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

220,504 110,252 55,126 27,563 82,690 41,345 124,036 62,018 31,009 93,028 46,514 23,257 69,772 34,886 17,443 52,330 26,165 78,496 39,248 19,624 9,812 4,906 2,453 7,360 3,680 1,840 920 460 230 115 346 173 520 260 130 65 196 98 49 148 74 37 112 56 28 14 7 22 11 34 17 52 26 13 40 20 10 5 16 8