λ
Sequence Observatory

151,418

2 × 75709
Deficient Even Composite

Starting at 151,418, the Collatz iteration reaches 1 after 201 steps. The first transition is 75709; the starting value is even with 4 positive divisors.

Prime Factor Structure

Factorization String 2 × 75709
Distinct Prime Factors 2
Square Status No
Abundance Measure Deficient

Analytical Properties

Total Divisors 4
Divisor Sum (σ) 227,130
Proper Divisor Sum 75,712
Digit Sum / Digital Root 20 (Root: 2)
Adjacent Primes #151397 ← → #151423

Radix Representation

Decimal 151418
Binary 100100111101111010 (18 bits)
Octal 0o447572
Hexadecimal 0x24F7A

Divisor Catalog (4)

1 2 75,709 151,418

Collatz Trajectory (201 steps to reach 1)

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

151,418 75,709 227,128 113,564 56,782 28,391 85,174 42,587 127,762 63,881 191,644 95,822 47,911 143,734 71,867 215,602 107,801 323,404 161,702 80,851 242,554 121,277 363,832 181,916 90,958 45,479 136,438 68,219 204,658 102,329 306,988 153,494 76,747 230,242 115,121 345,364 172,682 86,341 259,024 129,512 64,756 32,378 16,189 48,568 24,284 12,142 6,071 18,214 9,107 27,322 13,661 40,984 20,492 10,246 5,123 15,370 7,685 23,056 11,528 5,764

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