2,181,207
3 × 7 × 103867
Deficient
Odd
Composite
Starting at 2,181,207, the Collatz iteration reaches 1 after 148 steps. The first transition is 6543622; the starting value is odd with 8 positive divisors.
Resources
Prime Factor Structure
Factorization String
3 × 7 × 103867
Distinct Prime Factors
3
Square Status
No
Abundance Measure
Deficient
Analytical Properties
Total Divisors
8
Divisor Sum (σ)
3,323,776
Proper Divisor Sum
1,142,569
Digit Sum / Digital Root
21 (Root: 3)
Adjacent Primes
#2181203 ← → #2181209
Radix Representation
| Decimal | 2181207 |
| Binary | 1000010100100001010111 (22 bits) |
| Octal | 0o10244127 |
| Hexadecimal | 0x214857 |
Divisor Catalog (5 of 8)
Collatz Trajectory (148 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.