Base | Representation |
---|---|
bin | 110010010111… |
… | …111011011101 |
3 | 220211220010222 |
4 | 302113323131 |
5 | 11340031323 |
6 | 1151011125 |
7 | 220146110 |
oct | 62277335 |
9 | 26756128 |
10 | 13205213 |
11 | 74aa2aa |
12 | 4509aa5 |
13 | 2974748 |
14 | 1a7a577 |
15 | 125c9c8 |
hex | c97edd |
13205213 has 4 divisors (see below), whose sum is σ = 15091680. Its totient is φ = 11318748.
The previous prime is 13205207. The next prime is 13205249. The reversal of 13205213 is 31250231.
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.
It is not a de Polignac number, because 13205213 - 26 = 13205149 is a prime.
It is a Duffinian number.
It is a Curzon number.
It is a junction number, because it is equal to n+sod(n) for n = 13205191 and 13205200.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13205273) 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, 943223 + ... + 943236.
It is an arithmetic number, because the mean of its divisors is an integer number (3772920).
Almost surely, 213205213 is an apocalyptic number.
It is an amenable number.
13205213 is a deficient number, since it is larger than the sum of its proper divisors (1886467).
13205213 is an equidigital number, since it uses as much as digits as its factorization.
13205213 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 1886466.
The product of its (nonzero) digits is 180, while the sum is 17.
The square root of 13205213 is about 3633.8977696132. The cubic root of 13205213 is about 236.3642572290.
Adding to 13205213 its reverse (31250231), we get a palindrome (44455444).
The spelling of 13205213 in words is "thirteen million, two hundred five thousand, two hundred thirteen".
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