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21552543304331 = 135289913134057
BaseRepresentation
bin1001110011010000101111…
…01100000000101010001011
32211022101212210121001122212
410321220113230000222023
510311104102041214311
6113501033545135335
74353056054251424
oct471502754005213
984271783531585
1021552543304331
11695a422904686
12250103b18a54b
13c0451c34c060
14547211cdc64b
15275970006c8b
hex139a17b00a8b

21552543304331 has 8 divisors (see below), whose sum is σ = 23210482533504. Its totient is φ = 19894611401280.

The previous prime is 21552543304291. The next prime is 21552543304381. The reversal of 21552543304331 is 13340334525512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21552543304331 - 230 = 21551469562507 is a prime.

It is a super-2 number, since 2×215525433043312 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21552543304381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5309855 + ... + 8443911.

It is an arithmetic number, because the mean of its divisors is an integer number (2901310316688).

Almost surely, 221552543304331 is an apocalyptic number.

21552543304331 is a deficient number, since it is larger than the sum of its proper divisors (1657939229173).

21552543304331 is a wasteful number, since it uses less digits than its factorization.

21552543304331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3663061.

The product of its (nonzero) digits is 648000, while the sum is 41.

Adding to 21552543304331 its reverse (13340334525512), we get a palindrome (34892877829843).

The spelling of 21552543304331 in words is "twenty-one trillion, five hundred fifty-two billion, five hundred forty-three million, three hundred four thousand, three hundred thirty-one".

Divisors: 1 13 528991 3134057 6876883 40742741 1657887946487 21552543304331