Base | Representation |
---|---|
bin | 1100011010010110001… |
… | …1101110101000011011 |
3 | 202101101102202100010112 |
4 | 3012211203232220123 |
5 | 11443144114113222 |
6 | 241542412234535 |
7 | 21256030426145 |
oct | 3064543565033 |
9 | 671342670115 |
10 | 213231004187 |
11 | 82481385503 |
12 | 353aa76ba4b |
13 | 17152512236 |
14 | a46b3bdc95 |
15 | 582ed06be2 |
hex | 31a58eea1b |
213231004187 has 2 divisors, whose sum is σ = 213231004188. Its totient is φ = 213231004186.
The previous prime is 213231004141. The next prime is 213231004223. The reversal of 213231004187 is 781400132312.
It is a strong prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-213231004187 is a prime.
It is a super-2 number, since 2×2132310041872 (a number of 23 digits) contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (213231004117) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106615502093 + 106615502094.
It is an arithmetic number, because the mean of its divisors is an integer number (106615502094).
Almost surely, 2213231004187 is an apocalyptic number.
213231004187 is a deficient number, since it is larger than the sum of its proper divisors (1).
213231004187 is an equidigital number, since it uses as much as digits as its factorization.
213231004187 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 8064, while the sum is 32.
Adding to 213231004187 its reverse (781400132312), we get a palindrome (994631136499).
The spelling of 213231004187 in words is "two hundred thirteen billion, two hundred thirty-one million, four thousand, one hundred eighty-seven".
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