Base | Representation |
---|---|
bin | 111110100111011… |
… | …0001100011110001 |
3 | 12102102110010111002 |
4 | 1331032301203301 |
5 | 13300330300014 |
6 | 544252131345 |
7 | 103031263226 |
oct | 17516614361 |
9 | 5372403432 |
10 | 2101025009 |
11 | 988a79206 |
12 | 4a7766b55 |
13 | 276389585 |
14 | 15d07594d |
15 | c46badde |
hex | 7d3b18f1 |
2101025009 has 2 divisors, whose sum is σ = 2101025010. Its totient is φ = 2101025008.
The previous prime is 2101024957. The next prime is 2101025027. The reversal of 2101025009 is 9005201012.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 1573312225 + 527712784 = 39665^2 + 22972^2 .
It is a cyclic number.
It is not a de Polignac number, because 2101025009 - 216 = 2100959473 is a prime.
It is not a weakly prime, because it can be changed into another prime (2101025609) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1050512504 + 1050512505.
It is an arithmetic number, because the mean of its divisors is an integer number (1050512505).
Almost surely, 22101025009 is an apocalyptic number.
It is an amenable number.
2101025009 is a deficient number, since it is larger than the sum of its proper divisors (1).
2101025009 is an equidigital number, since it uses as much as digits as its factorization.
2101025009 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 180, while the sum is 20.
The square root of 2101025009 is about 45836.9393502664. The cubic root of 2101025009 is about 1280.7874811250.
The spelling of 2101025009 in words is "two billion, one hundred one million, twenty-five thousand, nine".
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