λ
Sequence Observatory

6,811,571

13 × 199 × 2633
Deficient Odd Composite

Starting at 6,811,571, the Collatz iteration reaches 1 after 178 steps. The first transition is 20434714; the starting value is odd with 8 positive divisors.

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Prime Factor Structure

Factorization String 13 × 199 × 2633
Distinct Prime Factors 3
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 8
Divisor Sum (σ) 7,375,200
Proper Divisor Sum 563,629
Digit Sum / Digital Root 29 (Root: 2)
Adjacent Primes #6811517 ← → #6811579

Radix Representation

Decimal 6811571
Binary 11001111110111110110011 (23 bits)
Octal 0o31767663
Hexadecimal 0x67EFB3

Divisor Catalog (5 of 8)

1 13 199 2,587 2,633

Collatz Trajectory (178 steps to reach 1)

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

Showing the first 5 trajectory entries; the stopping-time total above is unchanged.

6,811,571 20,434,714 10,217,357 30,652,072 15,326,036

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