λ
Sequence Observatory

2,155,463

2155463
Deficient Odd Prime

Starting at 2,155,463, the Collatz iteration reaches 1 after 241 steps. The first transition is 6466390; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 2155463
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 2,155,464
Proper Divisor Sum 1
Digit Sum / Digital Root 26 (Root: 8)
Adjacent Primes #2155451 ← → #2155477

Radix Representation

Decimal 2155463
Binary 1000001110001111000111 (22 bits)
Octal 0o10161707
Hexadecimal 0x20E3C7

Divisor Catalog (2)

Collatz Trajectory (241 steps to reach 1)

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

2,155,463 6,466,390 3,233,195 9,699,586 4,849,793 14,549,380 7,274,690 3,637,345 10,912,036 5,456,018 2,728,009 8,184,028 4,092,014 2,046,007 6,138,022 3,069,011 9,207,034 4,603,517 13,810,552 6,905,276 3,452,638 1,726,319 5,178,958 2,589,479 7,768,438 3,884,219 11,652,658 5,826,329 17,478,988 8,739,494 4,369,747 13,109,242 6,554,621 19,663,864 9,831,932 4,915,966 2,457,983 7,373,950 3,686,975 11,060,926 5,530,463 16,591,390 8,295,695 24,887,086 12,443,543 37,330,630 18,665,315 55,995,946 27,997,973 83,993,920 41,996,960 20,998,480 10,499,240 5,249,620 2,624,810 1,312,405 3,937,216 1,968,608 984,304 492,152

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