Base | Representation |
---|---|
bin | 11001101101000… |
… | …00001010000001 |
3 | 120000201022220201 |
4 | 30312200022001 |
5 | 420144122311 |
6 | 33221205201 |
7 | 5225455324 |
oct | 1466401201 |
9 | 500638821 |
10 | 215614081 |
11 | 100788061 |
12 | 60260801 |
13 | 358932c7 |
14 | 208c87bb |
15 | 13de09c1 |
hex | cda0281 |
215614081 has 2 divisors, whose sum is σ = 215614082. Its totient is φ = 215614080.
The previous prime is 215614067. The next prime is 215614097. The reversal of 215614081 is 180416512.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 173817856 + 41796225 = 13184^2 + 6465^2 .
It is a cyclic number.
It is not a de Polignac number, because 215614081 - 27 = 215613953 is a prime.
It is a super-2 number, since 2×2156140812 = 92978863850949122, which contains 22 as substring.
It is not a weakly prime, because it can be changed into another prime (215614381) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107807040 + 107807041.
It is an arithmetic number, because the mean of its divisors is an integer number (107807041).
Almost surely, 2215614081 is an apocalyptic number.
It is an amenable number.
215614081 is a deficient number, since it is larger than the sum of its proper divisors (1).
215614081 is an equidigital number, since it uses as much as digits as its factorization.
215614081 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 1920, while the sum is 28.
The square root of 215614081 is about 14683.8033560791. The cubic root of 215614081 is about 599.6424545704.
The spelling of 215614081 in words is "two hundred fifteen million, six hundred fourteen thousand, eighty-one".
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