Base | Representation |
---|---|
bin | 111010000010… |
… | …1010000110101 |
3 | 2010021000110201 |
4 | 1310011100311 |
5 | 30242232021 |
6 | 3004120501 |
7 | 516436651 |
oct | 164052065 |
9 | 63230421 |
10 | 30430261 |
11 | 161a4784 |
12 | a236131 |
13 | 63c5a94 |
14 | 4081a61 |
15 | 2a11591 |
hex | 1d05435 |
30430261 has 4 divisors (see below), whose sum is σ = 30884512. Its totient is φ = 29976012.
The previous prime is 30430223. The next prime is 30430271. The reversal of 30430261 is 16203403.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16203403 = 223 ⋅72661.
It is a cyclic number.
It is not a de Polignac number, because 30430261 - 211 = 30428213 is a prime.
It is a Duffinian number.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30430201) by changing a digit.
It is a pernicious number, because its binary representation contains a prime number (11) of ones.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227025 + ... + 227158.
It is an arithmetic number, because the mean of its divisors is an integer number (7721128).
Almost surely, 230430261 is an apocalyptic number.
It is an amenable number.
30430261 is a deficient number, since it is larger than the sum of its proper divisors (454251).
30430261 is an equidigital number, since it uses as much as digits as its factorization.
30430261 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 454250.
The product of its (nonzero) digits is 432, while the sum is 19.
The square root of 30430261 is about 5516.3630228621. The cubic root of 30430261 is about 312.2016728402.
Adding to 30430261 its reverse (16203403), we get a palindrome (46633664).
The spelling of 30430261 in words is "thirty million, four hundred thirty thousand, two hundred sixty-one".
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