Base | Representation |
---|---|
bin | 11001110100011… |
… | …10100010000001 |
3 | 120002112221021002 |
4 | 30322032202001 |
5 | 420421343330 |
6 | 33254141345 |
7 | 5236663040 |
oct | 1472164201 |
9 | 502487232 |
10 | 216590465 |
11 | 101294693 |
12 | 60651855 |
13 | 35b45850 |
14 | 20aa0557 |
15 | 14034e45 |
hex | ce8e881 |
216590465 has 16 divisors (see below), whose sum is σ = 319888128. Its totient is φ = 137094336.
The previous prime is 216590417. The next prime is 216590477. The reversal of 216590465 is 564095612.
It is a cyclic number.
It is not a de Polignac number, because 216590465 - 26 = 216590401 is a prime.
It is a super-2 number, since 2×2165904652 = 93822859057832450, which contains 22 as substring.
It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.
It is a Curzon number.
It is an unprimeable number.
It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 237557 + ... + 238466.
It is an arithmetic number, because the mean of its divisors is an integer number (19993008).
Almost surely, 2216590465 is an apocalyptic number.
It is an amenable number.
216590465 is a deficient number, since it is larger than the sum of its proper divisors (103297663).
216590465 is a wasteful number, since it uses less digits than its factorization.
216590465 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 476048.
The product of its (nonzero) digits is 64800, while the sum is 38.
The square root of 216590465 is about 14717.0127743371. The cubic root of 216590465 is about 600.5462294233.
The spelling of 216590465 in words is "two hundred sixteen million, five hundred ninety thousand, four hundred sixty-five".
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