Base | Representation |
---|---|
bin | 1011010000011… |
… | …0010111101101 |
3 | 10021211121201002 |
4 | 2310012113231 |
5 | 44041241023 |
6 | 4403530045 |
7 | 1112203232 |
oct | 264062755 |
9 | 107747632 |
10 | 47212013 |
11 | 247170a2 |
12 | 13989925 |
13 | 9a20404 |
14 | 63ad789 |
15 | 4228b28 |
hex | 2d065ed |
47212013 has 2 divisors, whose sum is σ = 47212014. Its totient is φ = 47212012.
The previous prime is 47212003. The next prime is 47212021. The reversal of 47212013 is 31021274.
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 37982569 + 9229444 = 6163^2 + 3038^2 .
It is a cyclic number.
It is not a de Polignac number, because 47212013 - 212 = 47207917 is a prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (47212003) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23606006 + 23606007.
It is an arithmetic number, because the mean of its divisors is an integer number (23606007).
Almost surely, 247212013 is an apocalyptic number.
It is an amenable number.
47212013 is a deficient number, since it is larger than the sum of its proper divisors (1).
47212013 is an equidigital number, since it uses as much as digits as its factorization.
47212013 is an evil number, because the sum of its binary digits is even.
The product of its (nonzero) digits is 336, while the sum is 20.
The square root of 47212013 is about 6871.0998391815. The cubic root of 47212013 is about 361.4244310333.
Adding to 47212013 its reverse (31021274), we get a palindrome (78233287).
The spelling of 47212013 in words is "forty-seven million, two hundred twelve thousand, thirteen".
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