λ
Sequence Observatory

551,743

551743
Deficient Odd Prime

Starting at 551,743, the Collatz iteration reaches 1 after 146 steps. The first transition is 1655230; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 551743
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 551,744
Proper Divisor Sum 1
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #551731 ← → #551753

Radix Representation

Decimal 551743
Binary 10000110101100111111 (20 bits)
Octal 0o2065477
Hexadecimal 0x86B3F

Divisor Catalog (2)

1 551,743

Collatz Trajectory (146 steps to reach 1)

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

551,743 1,655,230 827,615 2,482,846 1,241,423 3,724,270 1,862,135 5,586,406 2,793,203 8,379,610 4,189,805 12,569,416 6,284,708 3,142,354 1,571,177 4,713,532 2,356,766 1,178,383 3,535,150 1,767,575 5,302,726 2,651,363 7,954,090 3,977,045 11,931,136 5,965,568 2,982,784 1,491,392 745,696 372,848 186,424 93,212 46,606 23,303 69,910 34,955 104,866 52,433 157,300 78,650 39,325 117,976 58,988 29,494 14,747 44,242 22,121 66,364 33,182 16,591 49,774 24,887 74,662 37,331 111,994 55,997 167,992 83,996 41,998 20,999

More profiles

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