2,721,263

131 × 20773

Starting at 2,721,263, the Collatz iteration reaches 1 after 231 steps. The first transition is 8163790; the starting value is odd with 4 positive divisors.

Prime Factor Structure

Factorization String 131 × 20773

Distinct Prime Factors 2

Square Status No

Abundance Measure Deficient

Analytical Properties

Total Divisors 4

Divisor Sum (σ) 2,742,168

Proper Divisor Sum 20,905

Digit Sum / Digital Root 23 (Root: 5)

Adjacent Primes #2721259 ← → #2721307

Radix Representation

Decimal	2721263
Binary	1010011000010111101111 (22 bits)
Octal	0o12302757
Hexadecimal	0x2985EF

Divisor Catalog (4)

1 131 20,773 2,721,263

Collatz Trajectory (231 steps to reach 1)

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

2,721,263 8,163,790 4,081,895 12,245,686 6,122,843 18,368,530 9,184,265 27,552,796 13,776,398 6,888,199 20,664,598 10,332,299 30,996,898 15,498,449 46,495,348 23,247,674 11,623,837 34,871,512 17,435,756 8,717,878 4,358,939 13,076,818 6,538,409 19,615,228 9,807,614 4,903,807 14,711,422 7,355,711 22,067,134 11,033,567 33,100,702 16,550,351 49,651,054 24,825,527 74,476,582 37,238,291 111,714,874 55,857,437 167,572,312 83,786,156 41,893,078 20,946,539 62,839,618 31,419,809 94,259,428 47,129,714 23,564,857 70,694,572 35,347,286 17,673,643 53,020,930 26,510,465 79,531,396 39,765,698 19,882,849 59,648,548 29,824,274 14,912,137 44,736,412 22,368,206

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