λ
Sigma Notebook

818,215

5 × 163643
Deficient Odd Composite

818,215 is odd and not a perfect square. Its factorization is 5 × 163643 and its 4 divisors sum to 981,864.

Prime Factor Structure

Factorization String 5 × 163643
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 981,864
Proper Divisor Sum 163,649
Digit Sum / Digital Root 25 (Root: 7)
Adjacent Primes #818189 ← → #818219

Radix Representation

Decimal 818215
Binary 11000111110000100111 (20 bits)
Octal 0o3076047
Hexadecimal 0xC7C27

Divisor Catalog (4)

1 5 163,643 818,215

Collatz Trajectory (268 steps to reach 1)

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

818,215 2,454,646 1,227,323 3,681,970 1,840,985 5,522,956 2,761,478 1,380,739 4,142,218 2,071,109 6,213,328 3,106,664 1,553,332 776,666 388,333 1,165,000 582,500 291,250 145,625 436,876 218,438 109,219 327,658 163,829 491,488 245,744 122,872 61,436 30,718 15,359 46,078 23,039 69,118 34,559 103,678 51,839 155,518 77,759 233,278 116,639 349,918 174,959 524,878 262,439 787,318 393,659 1,180,978 590,489 1,771,468 885,734 442,867 1,328,602 664,301 1,992,904 996,452 498,226 249,113 747,340 373,670 186,835

More profiles

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