Base | Representation |
---|---|
bin | 11001001101000… |
… | …11101011101001 |
3 | 112201211222012221 |
4 | 30212203223221 |
5 | 413111343332 |
6 | 32551434041 |
7 | 5145106201 |
oct | 1446435351 |
9 | 481758187 |
10 | 211434217 |
11 | a9392725 |
12 | 5a985921 |
13 | 34a5b907 |
14 | 2011b401 |
15 | 13867297 |
hex | c9a3ae9 |
211434217 has 4 divisors (see below), whose sum is σ = 211758660. Its totient is φ = 211109776.
The previous prime is 211434203. The next prime is 211434221. The reversal of 211434217 is 712434112.
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 66977856 + 144456361 = 8184^2 + 12019^2 .
It is a cyclic number.
It is not a de Polignac number, because 211434217 - 219 = 210909929 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 211434191 and 211434200.
It is not an unprimeable number, because it can be changed into a prime (211434227) 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, 161242 + ... + 162547.
It is an arithmetic number, because the mean of its divisors is an integer number (52939665).
Almost surely, 2211434217 is an apocalyptic number.
It is an amenable number.
211434217 is a deficient number, since it is larger than the sum of its proper divisors (324443).
211434217 is an equidigital number, since it uses as much as digits as its factorization.
211434217 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 324442.
The product of its digits is 1344, while the sum is 25.
The square root of 211434217 is about 14540.7777302316. Note that the first 4 decimals coincide. The cubic root of 211434217 is about 595.7422809969.
Adding to 211434217 its reverse (712434112), we get a palindrome (923868329).
The spelling of 211434217 in words is "two hundred eleven million, four hundred thirty-four thousand, two hundred seventeen".
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