Base | Representation |
---|---|
bin | 101011111100… |
… | …1100001110101 |
3 | 1121100122220112 |
4 | 1113321201311 |
5 | 21344322130 |
6 | 2141512405 |
7 | 366566216 |
oct | 127714165 |
9 | 47318815 |
10 | 23042165 |
11 | 12008a13 |
12 | 7872705 |
13 | 4a0a023 |
14 | 30bb40d |
15 | 2052495 |
hex | 15f9875 |
23042165 has 4 divisors (see below), whose sum is σ = 27650604. Its totient is φ = 18433728.
The previous prime is 23042161. The next prime is 23042179. The reversal of 23042165 is 56124032.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 3319684 + 19722481 = 1822^2 + 4441^2 .
It is a cyclic number.
It is not a de Polignac number, because 23042165 - 22 = 23042161 is a prime.
It is a Duffinian number.
It is a self number, because there is not a number n which added to its sum of digits gives 23042165.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (23042161) 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, 2304212 + ... + 2304221.
It is an arithmetic number, because the mean of its divisors is an integer number (6912651).
Almost surely, 223042165 is an apocalyptic number.
It is an amenable number.
23042165 is a deficient number, since it is larger than the sum of its proper divisors (4608439).
23042165 is an equidigital number, since it uses as much as digits as its factorization.
23042165 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 4608438.
The product of its (nonzero) digits is 1440, while the sum is 23.
The square root of 23042165 is about 4800.2255155357. The cubic root of 23042165 is about 284.5603768972.
Adding to 23042165 its reverse (56124032), we get a palindrome (79166197).
The spelling of 23042165 in words is "twenty-three million, forty-two thousand, one hundred sixty-five".
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