Base | Representation |
---|---|
bin | 101001000011… |
… | …0101001100001 |
3 | 1111111111001200 |
4 | 1102012221201 |
5 | 21002214131 |
6 | 2045151413 |
7 | 350641251 |
oct | 122065141 |
9 | 44444050 |
10 | 21523041 |
11 | 11170641 |
12 | 725b569 |
13 | 45c7737 |
14 | 2c03961 |
15 | 1d522e6 |
hex | 1486a61 |
21523041 has 6 divisors (see below), whose sum is σ = 31088850. Its totient is φ = 14348688.
The previous prime is 21523001. The next prime is 21523049. The reversal of 21523041 is 14032512.
It can be written as a sum of positive squares in only one way, i.e., 13905441 + 7617600 = 3729^2 + 2760^2 .
It is not a de Polignac number, because 21523041 - 213 = 21514849 is a prime.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (21523049) by changing a digit.
It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1195716 + ... + 1195733.
It is an arithmetic number, because the mean of its divisors is an integer number (5181475).
Almost surely, 221523041 is an apocalyptic number.
It is an amenable number.
21523041 is a deficient number, since it is larger than the sum of its proper divisors (9565809).
21523041 is a wasteful number, since it uses less digits than its factorization.
21523041 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 2391455 (or 2391452 counting only the distinct ones).
The product of its (nonzero) digits is 240, while the sum is 18.
The square root of 21523041 is about 4639.2931573678. The cubic root of 21523041 is about 278.1641845393.
Adding to 21523041 its reverse (14032512), we get a palindrome (35555553).
The spelling of 21523041 in words is "twenty-one million, five hundred twenty-three thousand, forty-one".
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