Base | Representation |
---|---|
bin | 11000100111000011… |
… | …01110100001110001 |
3 | 1021002210200001211010 |
4 | 30103201232201301 |
5 | 204024400312241 |
6 | 10023021541133 |
7 | 645263325153 |
oct | 142341564161 |
9 | 37083601733 |
10 | 13212510321 |
11 | 567013261a |
12 | 2688a147a9 |
13 | 132741935a |
14 | 8d4a86ad3 |
15 | 524e2cd16 |
hex | 31386e871 |
13212510321 has 4 divisors (see below), whose sum is σ = 17616680432. Its totient is φ = 8808340212.
The previous prime is 13212510317. The next prime is 13212510329. The reversal of 13212510321 is 12301521231.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12301521231 = 3 ⋅4100507077.
It is not a de Polignac number, because 13212510321 - 22 = 13212510317 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (13212510329) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2202085051 + ... + 2202085056.
It is an arithmetic number, because the mean of its divisors is an integer number (4404170108).
Almost surely, 213212510321 is an apocalyptic number.
It is an amenable number.
13212510321 is a deficient number, since it is larger than the sum of its proper divisors (4404170111).
13212510321 is an equidigital number, since it uses as much as digits as its factorization.
13212510321 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 4404170110.
The product of its (nonzero) digits is 360, while the sum is 21.
The spelling of 13212510321 in words is "thirteen billion, two hundred twelve million, five hundred ten thousand, three hundred twenty-one".
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