2,221,745

5 × 444349

Starting at 2,221,745, the Collatz iteration reaches 1 after 148 steps. The first transition is 6665236; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 5 × 444349

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,666,100

Proper Divisor Sum 444,355

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #2221741 ← → #2221753

Radix Representation

Decimal	2221745
Binary	1000011110011010110001 (22 bits)
Octal	0o10363261
Hexadecimal	0x21E6B1

Divisor Catalog (4)

1 5 444,349 2,221,745

Collatz Trajectory (148 steps to reach 1)

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

2,221,745 6,665,236 3,332,618 1,666,309 4,998,928 2,499,464 1,249,732 624,866 312,433 937,300 468,650 234,325 702,976 351,488 175,744 87,872 43,936 21,968 10,984 5,492 2,746 1,373 4,120 2,060 1,030 515 1,546 773 2,320 1,160 580 290 145 436 218 109 328 164 82 41 124 62 31 94 47 142 71 214 107 322 161 484 242 121 364 182 91 274 137 412

← Previous Integer #2,221,744 Browse Full Index Next Integer #2,221,746 →