λ
Integer Codex

65,521

65521
Deficient Odd Prime

Prime Factor Structure

Factorization String 65521
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 65,522
Proper Divisor Sum 1
Digit Sum / Digital Root 19 (Root: 1)
Adjacent Primes #65519 ← → #65537

Radix Representation

Decimal 65521
Binary 1111111111110001 (16 bits)
Octal 0o177761
Hexadecimal 0xFFF1

Divisor Catalog (2)

Collatz Trajectory (161 steps to reach 1)

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

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