7,021,915

5 × 29 × 79 × 613

Starting at 7,021,915, the Collatz iteration reaches 1 after 178 steps. The first transition is 21065746; the starting value is odd with 16 positive divisors.

Prime Factor Structure

Factorization String 5 × 29 × 79 × 613

Distinct Prime Factors 4

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 16

Divisor Sum (σ) 8,841,600

Proper Divisor Sum 1,819,685

Digit Sum / Digital Root 25 (Root: 7)

Adjacent Primes #7021913 ← → #7021939

Radix Representation

Decimal	7021915
Binary	11010110010010101011011 (23 bits)
Octal	0o32622533
Hexadecimal	0x6B255B

Divisor Catalog (16)

1 5 29 79 145 395 613 2,291 3,065 11,455 17,777 48,427 88,885 242,135 1,404,383 7,021,915

Collatz Trajectory (178 steps to reach 1)

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

7,021,915 21,065,746 10,532,873 31,598,620 15,799,310 7,899,655 23,698,966 11,849,483 35,548,450 17,774,225 53,322,676 26,661,338 13,330,669 39,992,008 19,996,004 9,998,002 4,999,001 14,997,004 7,498,502 3,749,251 11,247,754 5,623,877 16,871,632 8,435,816 4,217,908 2,108,954 1,054,477 3,163,432 1,581,716 790,858 395,429 1,186,288 593,144 296,572 148,286 74,143 222,430 111,215 333,646 166,823 500,470 250,235 750,706 375,353 1,126,060 563,030 281,515 844,546 422,273 1,266,820 633,410 316,705 950,116 475,058 237,529 712,588 356,294 178,147 534,442 267,221

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