λ
Sequence Observatory

2,185,471

2185471
Deficient Odd Prime

Starting at 2,185,471, the Collatz iteration reaches 1 after 197 steps. The first transition is 6556414; the starting value is odd with 2 positive divisors.

Prime Factor Structure

Factorization String 2185471
Distinct Prime Factors 1
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 2
Divisor Sum (σ) 2,185,472
Proper Divisor Sum 1
Digit Sum / Digital Root 28 (Root: 1)
Adjacent Primes #2185439 ← → #2185481

Radix Representation

Decimal 2185471
Binary 1000010101100011111111 (22 bits)
Octal 0o10254377
Hexadecimal 0x2158FF

Divisor Catalog (2)

Collatz Trajectory (197 steps to reach 1)

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

2,185,471 6,556,414 3,278,207 9,834,622 4,917,311 14,751,934 7,375,967 22,127,902 11,063,951 33,191,854 16,595,927 49,787,782 24,893,891 74,681,674 37,340,837 112,022,512 56,011,256 28,005,628 14,002,814 7,001,407 21,004,222 10,502,111 31,506,334 15,753,167 47,259,502 23,629,751 70,889,254 35,444,627 106,333,882 53,166,941 159,500,824 79,750,412 39,875,206 19,937,603 59,812,810 29,906,405 89,719,216 44,859,608 22,429,804 11,214,902 5,607,451 16,822,354 8,411,177 25,233,532 12,616,766 6,308,383 18,925,150 9,462,575 28,387,726 14,193,863 42,581,590 21,290,795 63,872,386 31,936,193 95,808,580 47,904,290 23,952,145 71,856,436 35,928,218 17,964,109

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