λ
Sigma Notebook

2,155,204

22 × 538801
Deficient Even Composite

2,155,204 is even and not a perfect square. Its factorization is 2^2 × 538801 and its 6 divisors sum to 3,771,614.

Prime Factor Structure

Factorization String 2^2 × 538801
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 6
Divisor Sum (σ) 3,771,614
Proper Divisor Sum 1,616,410
Digit Sum / Digital Root 19 (Root: 1)
Adjacent Primes #2155201 ← → #2155207

Radix Representation

Decimal 2155204
Binary 1000001110001011000100 (22 bits)
Octal 0o10161304
Hexadecimal 0x20E2C4

Divisor Catalog (6)

1 2 4 538,801 1,077,602 2,155,204

Collatz Trajectory (210 steps to reach 1)

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

2,155,204 1,077,602 538,801 1,616,404 808,202 404,101 1,212,304 606,152 303,076 151,538 75,769 227,308 113,654 56,827 170,482 85,241 255,724 127,862 63,931 191,794 95,897 287,692 143,846 71,923 215,770 107,885 323,656 161,828 80,914 40,457 121,372 60,686 30,343 91,030 45,515 136,546 68,273 204,820 102,410 51,205 153,616 76,808 38,404 19,202 9,601 28,804 14,402 7,201 21,604 10,802 5,401 16,204 8,102 4,051 12,154 6,077 18,232 9,116 4,558 2,279

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