1,518,377

7 × 216911

Starting at 1,518,377, the Collatz iteration reaches 1 after 217 steps. The first transition is 4555132; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 7 × 216911

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 1,735,296

Proper Divisor Sum 216,919

Digit Sum / Digital Root 32 (Root: 5)

Adjacent Primes #1518359 ← → #1518379

Radix Representation

Decimal	1518377
Binary	101110010101100101001 (21 bits)
Octal	0o5625451
Hexadecimal	0x172B29

Divisor Catalog (4)

1 7 216,911 1,518,377

Collatz Trajectory (217 steps to reach 1)

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

1,518,377 4,555,132 2,277,566 1,138,783 3,416,350 1,708,175 5,124,526 2,562,263 7,686,790 3,843,395 11,530,186 5,765,093 17,295,280 8,647,640 4,323,820 2,161,910 1,080,955 3,242,866 1,621,433 4,864,300 2,432,150 1,216,075 3,648,226 1,824,113 5,472,340 2,736,170 1,368,085 4,104,256 2,052,128 1,026,064 513,032 256,516 128,258 64,129 192,388 96,194 48,097 144,292 72,146 36,073 108,220 54,110 27,055 81,166 40,583 121,750 60,875 182,626 91,313 273,940 136,970 68,485 205,456 102,728 51,364 25,682 12,841 38,524 19,262 9,631

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