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230655665 = 5316914557
BaseRepresentation
bin11011011111110…
…00011010110001
3121002000112002102
431233320122301
5433021440130
634515430145
75500353332
oct1557703261
9532015072
10230655665
11109221019
12652b5355
1338a2b856
14228c2289
15153b2645
hexdbf86b1

230655665 has 8 divisors (see below), whose sum is σ = 276893160. Its totient is φ = 184453632.

The previous prime is 230655637. The next prime is 230655679. The reversal of 230655665 is 566556032.

It can be written as a sum of positive squares in 4 ways, for example, as 21939856 + 208715809 = 4684^2 + 14447^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 230655665 - 28 = 230655409 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8567 + ... + 23123.

It is an arithmetic number, because the mean of its divisors is an integer number (34611645).

Almost surely, 2230655665 is an apocalyptic number.

It is an amenable number.

230655665 is a deficient number, since it is larger than the sum of its proper divisors (46237495).

230655665 is a wasteful number, since it uses less digits than its factorization.

230655665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17731.

The product of its (nonzero) digits is 162000, while the sum is 38.

The square root of 230655665 is about 15187.3521391979. The cubic root of 230655665 is about 613.2742196165.

The spelling of 230655665 in words is "two hundred thirty million, six hundred fifty-five thousand, six hundred sixty-five".

Divisors: 1 5 3169 14557 15845 72785 46131133 230655665