Base | Representation |
---|---|
bin | 110010011110… |
… | …000000000001 |
3 | 220220011021000 |
4 | 302132000001 |
5 | 11341330311 |
6 | 1151322213 |
7 | 220311444 |
oct | 62360001 |
9 | 26804230 |
10 | 13230081 |
11 | 7516a57 |
12 | 4520369 |
13 | 2982b67 |
14 | 1a8565b |
15 | 1265056 |
hex | c9e001 |
13230081 has 8 divisors (see below), whose sum is σ = 19600160. Its totient is φ = 8820036.
The previous prime is 13230079. The next prime is 13230109. The reversal of 13230081 is 18003231.
It is not a de Polignac number, because 13230081 - 21 = 13230079 is a prime.
It is a super-2 number, since 2×132300812 = 350070086533122, which contains 22 as substring.
It is a Duffinian number.
It is a Curzon number.
It is not an unprimeable number, because it can be changed into a prime (13230001) by changing a digit.
It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244975 + ... + 245028.
It is an arithmetic number, because the mean of its divisors is an integer number (2450020).
It is a Proth number, since it is equal to 1615 ⋅ 213 + 1 and 1615 < 213.
Almost surely, 213230081 is an apocalyptic number.
It is an amenable number.
13230081 is a deficient number, since it is larger than the sum of its proper divisors (6370079).
13230081 is an equidigital number, since it uses as much as digits as its factorization.
13230081 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 490012 (or 490006 counting only the distinct ones).
The product of its (nonzero) digits is 144, while the sum is 18.
The square root of 13230081 is about 3637.3178304899. The cubic root of 13230081 is about 236.5125375698.
The spelling of 13230081 in words is "thirteen million, two hundred thirty thousand, eighty-one".
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