Base | Representation |
---|---|
bin | 111110100111110… |
… | …0001101011110000 |
3 | 12102102211010212210 |
4 | 1331033201223300 |
5 | 13300403102003 |
6 | 544300252120 |
7 | 103033044015 |
oct | 17517415360 |
9 | 5372733783 |
10 | 2101222128 |
11 | 9890a3315 |
12 | 4a7841040 |
13 | 276428205 |
14 | 15d0c770c |
15 | c4709503 |
hex | 7d3e1af0 |
2101222128 has 20 divisors (see below), whose sum is σ = 5428157288. Its totient is φ = 700407360.
The previous prime is 2101222121. The next prime is 2101222163. The reversal of 2101222128 is 8212221012.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (2101222121) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21887683 + ... + 21887778.
Almost surely, 22101222128 is an apocalyptic number.
It is an amenable number.
2101222128 is an abundant number, since it is smaller than the sum of its proper divisors (3326935160).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
2101222128 is a wasteful number, since it uses less digits than its factorization.
2101222128 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 43775472 (or 43775466 counting only the distinct ones).
The product of its (nonzero) digits is 256, while the sum is 21.
The square root of 2101222128 is about 45839.0895197538. The cubic root of 2101222128 is about 1280.8275345357.
The spelling of 2101222128 in words is "two billion, one hundred one million, two hundred twenty-two thousand, one hundred twenty-eight".
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