Base | Representation |
---|---|
bin | 1001110010101… |
… | …01010001101011 |
3 | 12201120001110021 |
4 | 10321111101223 |
5 | 132011410334 |
6 | 12052301311 |
7 | 2015110012 |
oct | 471252153 |
9 | 181501407 |
10 | 82138219 |
11 | 42401729 |
12 | 23611837 |
13 | 1402b6c7 |
14 | aca1a79 |
15 | 73273b4 |
hex | 4e5546b |
82138219 has 2 divisors, whose sum is σ = 82138220. Its totient is φ = 82138218.
The previous prime is 82138201. The next prime is 82138223. The reversal of 82138219 is 91283128.
It is a strong prime.
It is a cyclic number.
It is not a de Polignac number, because 82138219 - 217 = 82007147 is a prime.
It is a super-2 number, since 2×821382192 = 13493374040983922, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (82138249) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41069109 + 41069110.
It is an arithmetic number, because the mean of its divisors is an integer number (41069110).
Almost surely, 282138219 is an apocalyptic number.
82138219 is a deficient number, since it is larger than the sum of its proper divisors (1).
82138219 is an equidigital number, since it uses as much as digits as its factorization.
82138219 is an evil number, because the sum of its binary digits is even.
The product of its digits is 6912, while the sum is 34.
The square root of 82138219 is about 9063.0137923320. The cubic root of 82138219 is about 434.6921131327.
The spelling of 82138219 in words is "eighty-two million, one hundred thirty-eight thousand, two hundred nineteen".
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