5,187,981

3 × 1729327

Starting at 5,187,981, the Collatz iteration reaches 1 after 219 steps. The first transition is 15563944; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 3 × 1729327

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 6,917,312

Proper Divisor Sum 1,729,331

Digit Sum / Digital Root 39 (Root: 3)

Adjacent Primes #5187979 ← → #5187991

Radix Representation

Decimal	5187981
Binary	10011110010100110001101 (23 bits)
Octal	0o23624615
Hexadecimal	0x4F298D

Divisor Catalog (4)

1 3 1,729,327 5,187,981

Collatz Trajectory (219 steps to reach 1)

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

5,187,981 15,563,944 7,781,972 3,890,986 1,945,493 5,836,480 2,918,240 1,459,120 729,560 364,780 182,390 91,195 273,586 136,793 410,380 205,190 102,595 307,786 153,893 461,680 230,840 115,420 57,710 28,855 86,566 43,283 129,850 64,925 194,776 97,388 48,694 24,347 73,042 36,521 109,564 54,782 27,391 82,174 41,087 123,262 61,631 184,894 92,447 277,342 138,671 416,014 208,007 624,022 312,011 936,034 468,017 1,404,052 702,026 351,013 1,053,040 526,520 263,260 131,630 65,815 197,446

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