2,215,558

2 × 41² × 659

2,215,558 factors as 2 × 41^2 × 659. Its 12 positive divisors give a proper-divisor sum of 1,195,982, so this integer is deficient. The Collatz stopping time is 60 steps.

Prime Factor Structure

Factorization String 2 × 41^2 × 659

Distinct Prime Factors 3

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 12

Divisor Sum (σ) 3,411,540

Proper Divisor Sum 1,195,982

Digit Sum / Digital Root 28 (Root: 1)

Adjacent Primes #2215547 ← → #2215561

Radix Representation

Decimal	2215558
Binary	1000011100111010000110 (22 bits)
Octal	0o10347206
Hexadecimal	0x21CE86

Divisor Catalog (12)

1 2 41 82 659 1,318 1,681 3,362 27,019 54,038 1,107,779 2,215,558

Collatz Trajectory (60 steps to reach 1)

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

2,215,558 1,107,779 3,323,338 1,661,669 4,985,008 2,492,504 1,246,252 623,126 311,563 934,690 467,345 1,402,036 701,018 350,509 1,051,528 525,764 262,882 131,441 394,324 197,162 98,581 295,744 147,872 73,936 36,968 18,484 9,242 4,621 13,864 6,932 3,466 1,733 5,200 2,600 1,300 650 325 976 488 244 122 61 184 92 46 23 70 35 106 53 160 80 40 20 10 5 16 8 4 2

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