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13239224642 = 2725921972
BaseRepresentation
bin11000101010001111…
…01000100101000010
31021011122221021222102
430111013220211002
5204103220142032
610025414310402
7646036360400
oct142507504502
937148837872
1013239224642
115684219476
122695958402
13132cb10947
148d843c470
15527458362
hex3151e8942

13239224642 has 54 divisors (see below), whose sum is σ = 23619167577. Its totient is φ = 5549471088.

The previous prime is 13239224639. The next prime is 13239224659. The reversal of 13239224642 is 24642293231.

It can be written as a sum of positive squares in 2 ways, for example, as 8482225801 + 4756998841 = 92099^2 + 68971^2 .

It is an ABA number since it can be written as A⋅BA, here for A=2, B=81361.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13239224596 and 13239224605.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 67204088 + ... + 67204284.

Almost surely, 213239224642 is an apocalyptic number.

13239224642 is a deficient number, since it is larger than the sum of its proper divisors (10379942935).

13239224642 is an frugal number, since it uses more digits than its factorization.

13239224642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 528 (or 265 counting only the distinct ones).

The product of its digits is 124416, while the sum is 38.

The spelling of 13239224642 in words is "thirteen billion, two hundred thirty-nine million, two hundred twenty-four thousand, six hundred forty-two".

Divisors: 1 2 7 14 49 59 98 118 197 394 413 826 1379 2758 2891 3481 5782 6962 9653 11623 19306 23246 24367 38809 48734 77618 81361 162722 170569 271663 341138 543326 569527 685757 1139054 1371514 1901641 2289731 3803282 4579462 4800299 9600598 16028117 32056234 33602093 67204186 112196819 135094129 224393638 270188258 945658903 1891317806 6619612321 13239224642