Base | Representation |
---|---|
bin | 1100001110100… |
… | …01010100000101 |
3 | 21011000001112001 |
4 | 12013101110011 |
5 | 202224203341 |
6 | 14102225301 |
7 | 2353552426 |
oct | 607212405 |
9 | 234001461 |
10 | 102569221 |
11 | 52996857 |
12 | 2a425231 |
13 | 18333061 |
14 | d89d64d |
15 | 9010d31 |
hex | 61d1505 |
102569221 has 2 divisors, whose sum is σ = 102569222. Its totient is φ = 102569220.
The previous prime is 102569219. The next prime is 102569231. The reversal of 102569221 is 122965201.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 72165025 + 30404196 = 8495^2 + 5514^2 .
It is a cyclic number.
It is not a de Polignac number, because 102569221 - 21 = 102569219 is a prime.
Together with 102569219, it forms a pair of twin primes.
It is a Chen prime.
It is a self number, because there is not a number n which added to its sum of digits gives 102569221.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (102569231) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51284610 + 51284611.
It is an arithmetic number, because the mean of its divisors is an integer number (51284611).
Almost surely, 2102569221 is an apocalyptic number.
It is an amenable number.
102569221 is a deficient number, since it is larger than the sum of its proper divisors (1).
102569221 is an equidigital number, since it uses as much as digits as its factorization.
102569221 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 2160, while the sum is 28.
The square root of 102569221 is about 10127.6463702086. The cubic root of 102569221 is about 468.1004073288.
The spelling of 102569221 in words is "one hundred two million, five hundred sixty-nine thousand, two hundred twenty-one".
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