λ
Sequence Observatory

6,221,900

22 × 52 × 62219
Abundant Even Composite

Starting at 6,221,900, the Collatz iteration reaches 1 after 77 steps. The first transition is 3110950; the starting value is even with 18 positive divisors.

Prime Factor Structure

Factorization String 2^2 × 5^2 × 62219
Distinct Prime Factors 3
Square Status No
Abundance Measure Abundant

Analytical Properties

Total Divisors 18
Divisor Sum (σ) 13,501,740
Proper Divisor Sum 7,279,840
Digit Sum / Digital Root 20 (Root: 2)
Adjacent Primes #6221879 ← → #6221909

Radix Representation

Decimal 6221900
Binary 10111101111000001001100 (23 bits)
Octal 0o27570114
Hexadecimal 0x5EF04C

Divisor Catalog (18)

1 2 4 5 10 20 25 50 100 62,219 124,438 248,876 311,095 622,190 1,244,380 1,555,475 3,110,950 6,221,900

Collatz Trajectory (77 steps to reach 1)

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

6,221,900 3,110,950 1,555,475 4,666,426 2,333,213 6,999,640 3,499,820 1,749,910 874,955 2,624,866 1,312,433 3,937,300 1,968,650 984,325 2,952,976 1,476,488 738,244 369,122 184,561 553,684 276,842 138,421 415,264 207,632 103,816 51,908 25,954 12,977 38,932 19,466 9,733 29,200 14,600 7,300 3,650 1,825 5,476 2,738 1,369 4,108 2,054 1,027 3,082 1,541 4,624 2,312 1,156 578 289 868 434 217 652 326 163 490 245 736 368 184

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