Base | Representation |
---|---|
bin | 111001011110… |
… | …0000000101111 |
3 | 2002200202220012 |
4 | 1302330000233 |
5 | 30203131343 |
6 | 2553443435 |
7 | 514050134 |
oct | 162740057 |
9 | 62622805 |
10 | 30130223 |
11 | 1600a312 |
12 | a11057b |
13 | 631c346 |
14 | 400458b |
15 | 29a2718 |
hex | 1cbc02f |
30130223 has 4 divisors (see below), whose sum is σ = 30145920. Its totient is φ = 30114528.
The previous prime is 30130213. The next prime is 30130231. The reversal of 30130223 is 32203103.
It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32203103 = 139 ⋅231677.
It is a cyclic number.
It is not a de Polignac number, because 30130223 - 210 = 30129199 is a prime.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 30130198 and 30130207.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30130213) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4490 + ... + 8967.
It is an arithmetic number, because the mean of its divisors is an integer number (7536480).
Almost surely, 230130223 is an apocalyptic number.
30130223 is a deficient number, since it is larger than the sum of its proper divisors (15697).
30130223 is a wasteful number, since it uses less digits than its factorization.
30130223 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 15696.
The product of its (nonzero) digits is 108, while the sum is 14.
The square root of 30130223 is about 5489.1003816655. The cubic root of 30130223 is about 311.1721940107.
Adding to 30130223 its reverse (32203103), we get a palindrome (62333326).
The spelling of 30130223 in words is "thirty million, one hundred thirty thousand, two hundred twenty-three".
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