Base | Representation |
---|---|
bin | 11000100001000… |
… | …00101111110111 |
3 | 112022222100200000 |
4 | 30100200233313 |
5 | 410121430111 |
6 | 32223522343 |
7 | 5045016231 |
oct | 1420405767 |
9 | 468870600 |
10 | 205655031 |
11 | a60a573a |
12 | 58a593b3 |
13 | 337b728a |
14 | 1d455251 |
15 | 130c4c56 |
hex | c420bf7 |
205655031 has 24 divisors (see below), whose sum is σ = 324280320. Its totient is φ = 129884472.
The previous prime is 205655017. The next prime is 205655039. The reversal of 205655031 is 130556502.
205655031 is a `hidden beast` number, since 2 + 0 + 5 + 655 + 0 + 3 + 1 = 666.
205655031 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 205655031 - 211 = 205652983 is a prime.
It is a super-2 number, since 2×2056550312 = 84587983551221922, which contains 22 as substring.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a junction number, because it is equal to n+sod(n) for n = 205654986 and 205655004.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (205655039) by changing a digit.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17655 + ... + 26888.
It is an arithmetic number, because the mean of its divisors is an integer number (13511680).
Almost surely, 2205655031 is an apocalyptic number.
205655031 is a deficient number, since it is larger than the sum of its proper divisors (118625289).
205655031 is an equidigital number, since it uses as much as digits as its factorization.
205655031 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 44577 (or 44565 counting only the distinct ones).
The product of its (nonzero) digits is 4500, while the sum is 27.
The square root of 205655031 is about 14340.6774944561. The cubic root of 205655031 is about 590.2642032267.
The spelling of 205655031 in words is "two hundred five million, six hundred fifty-five thousand, thirty-one".
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