Base | Representation |
---|---|
bin | 11111001010101… |
… | …00010111110101 |
3 | 200012221120122111 |
4 | 33211110113311 |
5 | 1013412103023 |
6 | 41535331021 |
7 | 6323132461 |
oct | 1745242765 |
9 | 605846574 |
10 | 261441013 |
11 | 124638559 |
12 | 73680a71 |
13 | 4221a132 |
14 | 26a174a1 |
15 | 17e4400d |
hex | f9545f5 |
261441013 has 2 divisors, whose sum is σ = 261441014. Its totient is φ = 261441012.
The previous prime is 261440999. The next prime is 261441029. The reversal of 261441013 is 310144162.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 224011089 + 37429924 = 14967^2 + 6118^2 .
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-261441013 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (261441043) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (17) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 130720506 + 130720507.
It is an arithmetic number, because the mean of its divisors is an integer number (130720507).
Almost surely, 2261441013 is an apocalyptic number.
It is an amenable number.
261441013 is a deficient number, since it is larger than the sum of its proper divisors (1).
261441013 is an equidigital number, since it uses as much as digits as its factorization.
261441013 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 576, while the sum is 22.
The square root of 261441013 is about 16169.1376702655. The cubic root of 261441013 is about 639.4273955616.
Adding to 261441013 its reverse (310144162), we get a palindrome (571585175).
The spelling of 261441013 in words is "two hundred sixty-one million, four hundred forty-one thousand, thirteen".
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