217,281
3 × 23 × 47 × 67
Deficient
Odd
Composite
Starting at 217,281, the Collatz iteration reaches 1 after 142 steps. The first transition is 651844; the starting value is odd with 16 positive divisors.
Resources
Prime Factor Structure
Factorization String
3 × 23 × 47 × 67
Distinct Prime Factors
4
Square Status
No
Abundance Measure
Deficient
Analytical Properties
Total Divisors
16
Divisor Sum (σ)
313,344
Proper Divisor Sum
96,063
Digit Sum / Digital Root
21 (Root: 3)
Adjacent Primes
#217271 ← → #217307
Radix Representation
| Decimal | 217281 |
| Binary | 110101000011000001 (18 bits) |
| Octal | 0o650301 |
| Hexadecimal | 0x350C1 |
Divisor Catalog (5 of 16)
Collatz Trajectory (142 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.