λ
Sequence Observatory

2,251,549

613 × 3673
Deficient Odd Composite

Starting at 2,251,549, the Collatz iteration reaches 1 after 91 steps. The first transition is 6754648; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 613 × 3673
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 2,255,836
Proper Divisor Sum 4,287
Digit Sum / Digital Root 28 (Root: 1)
Adjacent Primes #2251547 ← → #2251553

Radix Representation

Decimal 2251549
Binary 1000100101101100011101 (22 bits)
Octal 0o10455435
Hexadecimal 0x225B1D

Divisor Catalog (4)

1 613 3,673 2,251,549

Collatz Trajectory (91 steps to reach 1)

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

2,251,549 6,754,648 3,377,324 1,688,662 844,331 2,532,994 1,266,497 3,799,492 1,899,746 949,873 2,849,620 1,424,810 712,405 2,137,216 1,068,608 534,304 267,152 133,576 66,788 33,394 16,697 50,092 25,046 12,523 37,570 18,785 56,356 28,178 14,089 42,268 21,134 10,567 31,702 15,851 47,554 23,777 71,332 35,666 17,833 53,500 26,750 13,375 40,126 20,063 60,190 30,095 90,286 45,143 135,430 67,715 203,146 101,573 304,720 152,360 76,180 38,090 19,045 57,136 28,568 14,284

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