Base | Representation |
---|---|
bin | 111001010101… |
… | …0110111111111 |
3 | 2002120012121111 |
4 | 1302222313333 |
5 | 30143410111 |
6 | 2552142451 |
7 | 513335401 |
oct | 162526777 |
9 | 62505544 |
10 | 30060031 |
11 | 15a71601 |
12 | a097a27 |
13 | 62c6401 |
14 | 3dc6b71 |
15 | 298ba21 |
hex | 1caadff |
30060031 has 4 divisors (see below), whose sum is σ = 30071952. Its totient is φ = 30048112.
The previous prime is 30059999. The next prime is 30060047. The reversal of 30060031 is 13006003.
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 13006003 = 17 ⋅765059.
It is a cyclic number.
It is not a de Polignac number, because 30060031 - 25 = 30059999 is a prime.
It is a super-2 number, since 2×300600312 = 1807210927441922, which contains 22 as substring.
It is a Duffinian number.
It is a junction number, because it is equal to n+sod(n) for n = 30059993 and 30060020.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (30060431) 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, 526 + ... + 7771.
It is an arithmetic number, because the mean of its divisors is an integer number (7517988).
Almost surely, 230060031 is an apocalyptic number.
30060031 is a deficient number, since it is larger than the sum of its proper divisors (11921).
30060031 is an equidigital number, since it uses as much as digits as its factorization.
30060031 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 11920.
The product of its (nonzero) digits is 54, while the sum is 13.
The square root of 30060031 is about 5482.7028918226. The cubic root of 30060031 is about 310.9303683675.
Adding to 30060031 its reverse (13006003), we get a palindrome (43066034).
The spelling of 30060031 in words is "thirty million, sixty thousand, thirty-one".
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