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21213612324415 = 571737995398711
BaseRepresentation
bin1001101001011001011011…
…10100111011011000111111
32210010000001010011100021201
410310230231310323120333
510240030434223340130
6113041222102040331
74316430042411640
oct464545564733077
983100033140251
1021213612324415
116839708134a15
12246740ba190a7
13bab586a92874
14534a5c5856c7
1526bc34b27bca
hex134b2dd3b63f

21213612324415 has 64 divisors (see below), whose sum is σ = 30918304143360. Its totient is φ = 13640212131840.

The previous prime is 21213612324391. The next prime is 21213612324433. The reversal of 21213612324415 is 51442321631212.

It is not a de Polignac number, because 21213612324415 - 25 = 21213612324383 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 214856910 + ... + 214955620.

It is an arithmetic number, because the mean of its divisors is an integer number (483098502240).

Almost surely, 221213612324415 is an apocalyptic number.

21213612324415 is a deficient number, since it is larger than the sum of its proper divisors (9704691818945).

21213612324415 is a wasteful number, since it uses less digits than its factorization.

21213612324415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100072.

The product of its digits is 69120, while the sum is 37.

Adding to 21213612324415 its reverse (51442321631212), we get a palindrome (72655933955627).

The spelling of 21213612324415 in words is "twenty-one trillion, two hundred thirteen billion, six hundred twelve million, three hundred twenty-four thousand, four hundred fifteen".

Divisors: 1 5 7 17 35 85 119 379 595 953 1895 2653 4765 6443 6671 13265 16201 32215 33355 45101 81005 98711 113407 225505 361187 493555 567035 690977 1678087 1805935 2528309 3454885 6140179 8390435 11746609 12641545 30700895 37411469 42981253 58733045 94071583 187057345 214906265 261880283 470357915 635994973 658501081 1309401415 1599216911 3179974865 3292505405 4451964811 7996084555 11194518377 22259824055 35653129957 55972591885 178265649785 249571909699 606103209269 1247859548495 3030516046345 4242722464883 21213612324415