Base | Representation |
---|---|
bin | 10110101011010… |
… | …110010010001101 |
3 | 222111220111001101 |
4 | 112223112102031 |
5 | 1234344242341 |
6 | 101430343101 |
7 | 12266606206 |
oct | 2653262215 |
9 | 874814041 |
10 | 380462221 |
11 | 185840997 |
12 | a74baa91 |
13 | 60a90699 |
14 | 3875a5ad |
15 | 23604831 |
hex | 16ad648d |
380462221 has 2 divisors, whose sum is σ = 380462222. Its totient is φ = 380462220.
The previous prime is 380462219. The next prime is 380462279. The reversal of 380462221 is 122264083.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 328116996 + 52345225 = 18114^2 + 7235^2 .
It is an emirp because it is prime and its reverse (122264083) is a distict prime.
It is a cyclic number.
It is not a de Polignac number, because 380462221 - 21 = 380462219 is a prime.
It is a super-3 number, since 3×3804622213 (a number of 27 digits) contains 333 as substring.
Together with 380462219, it forms a pair of twin primes.
It is a self number, because there is not a number n which added to its sum of digits gives 380462221.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (380462921) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190231110 + 190231111.
It is an arithmetic number, because the mean of its divisors is an integer number (190231111).
Almost surely, 2380462221 is an apocalyptic number.
It is an amenable number.
380462221 is a deficient number, since it is larger than the sum of its proper divisors (1).
380462221 is an equidigital number, since it uses as much as digits as its factorization.
380462221 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 4608, while the sum is 28.
The square root of 380462221 is about 19505.4408050677. The cubic root of 380462221 is about 724.6092042113.
The spelling of 380462221 in words is "three hundred eighty million, four hundred sixty-two thousand, two hundred twenty-one".
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