Base | Representation |
---|---|
bin | 11010010001100… |
… | …01111101010001 |
3 | 120100201202121211 |
4 | 31020301331101 |
5 | 422410434320 |
6 | 33512020121 |
7 | 5314262611 |
oct | 1510617521 |
9 | 510652554 |
10 | 220405585 |
11 | 10345aa84 |
12 | 61991641 |
13 | 3688020a |
14 | 213b4a41 |
15 | 1453a55a |
hex | d231f51 |
220405585 has 4 divisors (see below), whose sum is σ = 264486708. Its totient is φ = 176324464.
The previous prime is 220405583. The next prime is 220405621. The reversal of 220405585 is 585504022.
220405585 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 164634561 + 55771024 = 12831^2 + 7468^2 .
It is a cyclic number.
It is not a de Polignac number, because 220405585 - 21 = 220405583 is a prime.
It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (220405583) 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, 22040554 + ... + 22040563.
It is an arithmetic number, because the mean of its divisors is an integer number (66121677).
Almost surely, 2220405585 is an apocalyptic number.
It is an amenable number.
220405585 is a deficient number, since it is larger than the sum of its proper divisors (44081123).
220405585 is an equidigital number, since it uses as much as digits as its factorization.
220405585 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 44081122.
The product of its (nonzero) digits is 16000, while the sum is 31.
The square root of 220405585 is about 14846.0629461147. The cubic root of 220405585 is about 604.0518216798.
The spelling of 220405585 in words is "two hundred twenty million, four hundred five thousand, five hundred eighty-five".
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