λ
Sequence Observatory

8,515,749

3 × 11 × 211 × 1223
Deficient Odd Composite

Starting at 8,515,749, the Collatz iteration reaches 1 after 305 steps. The first transition is 25547248; the starting value is odd with 16 positive divisors.

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Prime Factor Structure

Factorization String 3 × 11 × 211 × 1223
Distinct Prime Factors 4
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 16
Divisor Sum (σ) 12,455,424
Proper Divisor Sum 3,939,675
Digit Sum / Digital Root 39 (Root: 3)
Adjacent Primes #8515747 ← → #8515757

Radix Representation

Decimal 8515749
Binary 100000011111000010100101 (24 bits)
Octal 0o40370245
Hexadecimal 0x81F0A5

Divisor Catalog (5 of 16)

1 3 11 33 211

Collatz Trajectory (305 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.

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