Base | Representation |
---|---|
bin | 11010010111110… |
… | …10000100110001 |
3 | 120102021102000100 |
4 | 31023322010301 |
5 | 423113202030 |
6 | 33541343013 |
7 | 5324245422 |
oct | 1513720461 |
9 | 512242010 |
10 | 221225265 |
11 | 10396a8a8 |
12 | 62107a69 |
13 | 36aa9331 |
14 | 21549649 |
15 | 1464d360 |
hex | d2fa131 |
221225265 has 24 divisors (see below), whose sum is σ = 403640640. Its totient is φ = 111776544.
The previous prime is 221225209. The next prime is 221225309. The reversal of 221225265 is 562522122.
221225265 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is not a de Polignac number, because 221225265 - 28 = 221225009 is a prime.
It is an unprimeable number.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128517 + ... + 130226.
It is an arithmetic number, because the mean of its divisors is an integer number (16818360).
Almost surely, 2221225265 is an apocalyptic number.
It is an amenable number.
221225265 is a deficient number, since it is larger than the sum of its proper divisors (182415375).
221225265 is a wasteful number, since it uses less digits than its factorization.
221225265 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 258773 (or 258770 counting only the distinct ones).
The product of its digits is 4800, while the sum is 27.
The square root of 221225265 is about 14873.6432994744. The cubic root of 221225265 is about 604.7997105824.
Adding to 221225265 its reverse (562522122), we get a palindrome (783747387).
The spelling of 221225265 in words is "two hundred twenty-one million, two hundred twenty-five thousand, two hundred sixty-five".
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