Base | Representation |
---|---|
bin | 101011001100… |
… | …0000101001101 |
3 | 1120121101101102 |
4 | 1112120011031 |
5 | 21244034041 |
6 | 2125152445 |
7 | 363314432 |
oct | 126300515 |
9 | 46541342 |
10 | 22643021 |
11 | 11866045 |
12 | 76bb725 |
13 | 48ca44b |
14 | 3015b89 |
15 | 1ec409b |
hex | 159814d |
22643021 has 2 divisors, whose sum is σ = 22643022. Its totient is φ = 22643020.
The previous prime is 22642999. The next prime is 22643039. The reversal of 22643021 is 12034622.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 22458121 + 184900 = 4739^2 + 430^2 .
It is a cyclic number.
It is not a de Polignac number, because 22643021 - 218 = 22380877 is a prime.
It is a junction number, because it is equal to n+sod(n) for n = 22642984 and 22643002.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (22643081) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11321510 + 11321511.
It is an arithmetic number, because the mean of its divisors is an integer number (11321511).
Almost surely, 222643021 is an apocalyptic number.
It is an amenable number.
22643021 is a deficient number, since it is larger than the sum of its proper divisors (1).
22643021 is an equidigital number, since it uses as much as digits as its factorization.
22643021 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 576, while the sum is 20.
The square root of 22643021 is about 4758.4683460122. The cubic root of 22643021 is about 282.9077142102.
Adding to 22643021 its reverse (12034622), we get a palindrome (34677643).
The spelling of 22643021 in words is "twenty-two million, six hundred forty-three thousand, twenty-one".
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