Base | Representation |
---|---|
bin | 11110100001000… |
… | …01110100011101 |
3 | 122211200200201201 |
4 | 33100201310131 |
5 | 1011013203234 |
6 | 41222435501 |
7 | 6225613435 |
oct | 1720416435 |
9 | 584620651 |
10 | 255991069 |
11 | 121555974 |
12 | 71892b91 |
13 | 4105c609 |
14 | 25dd92c5 |
15 | 17719314 |
hex | f421d1d |
255991069 has 2 divisors, whose sum is σ = 255991070. Its totient is φ = 255991068.
The previous prime is 255991067. The next prime is 255991111. The reversal of 255991069 is 960199552.
255991069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 164788569 + 91202500 = 12837^2 + 9550^2 .
It is a cyclic number.
It is not a de Polignac number, because 255991069 - 21 = 255991067 is a prime.
It is a super-2 number, since 2×2559910692 = 131062854815525522, which contains 22 as substring.
Together with 255991067, it forms a pair of twin primes.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (255991067) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127995534 + 127995535.
It is an arithmetic number, because the mean of its divisors is an integer number (127995535).
Almost surely, 2255991069 is an apocalyptic number.
It is an amenable number.
255991069 is a deficient number, since it is larger than the sum of its proper divisors (1).
255991069 is an equidigital number, since it uses as much as digits as its factorization.
255991069 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 218700, while the sum is 46.
The square root of 255991069 is about 15999.7209038158. The cubic root of 255991069 is about 634.9530368062.
The spelling of 255991069 in words is "two hundred fifty-five million, nine hundred ninety-one thousand, sixty-nine".
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