Base | Representation |
---|---|
bin | 11001010001011… |
… | …11110011000011 |
3 | 112202221010111000 |
4 | 30220233303003 |
5 | 413233230011 |
6 | 33012023043 |
7 | 5153016336 |
oct | 1450576303 |
9 | 482833430 |
10 | 212008131 |
11 | a9744935 |
12 | 5b001a83 |
13 | 34bccbca |
14 | 2022a61d |
15 | 1392c356 |
hex | ca2fcc3 |
212008131 has 8 divisors (see below), whose sum is σ = 314086160. Its totient is φ = 141338736.
The previous prime is 212008129. The next prime is 212008141. The reversal of 212008131 is 131800212.
It is not a de Polignac number, because 212008131 - 21 = 212008129 is a prime.
It is a super-2 number, since 2×2120081312 = 89894895220226322, which contains 22 as substring.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (212008141) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3926050 + ... + 3926103.
It is an arithmetic number, because the mean of its divisors is an integer number (39260770).
Almost surely, 2212008131 is an apocalyptic number.
212008131 is a deficient number, since it is larger than the sum of its proper divisors (102078029).
212008131 is an equidigital number, since it uses as much as digits as its factorization.
212008131 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 7852162 (or 7852156 counting only the distinct ones).
The product of its (nonzero) digits is 96, while the sum is 18.
The square root of 212008131 is about 14560.4989955702. The cubic root of 212008131 is about 596.2808187860.
Adding to 212008131 its reverse (131800212), we get a palindrome (343808343).
The spelling of 212008131 in words is "two hundred twelve million, eight thousand, one hundred thirty-one".
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