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230205245 = 5172708297
BaseRepresentation
bin11011011100010…
…10011100111101
3121001011122020012
431232022130331
5432413031440
634502033005
75463466214
oct1556123475
9531148205
10230205245
11108a43676
1265118765
133890182a
142280607b
1515323e65
hexdb8a73d

230205245 has 8 divisors (see below), whose sum is σ = 292496184. Its totient is φ = 173330944.

The previous prime is 230205223. The next prime is 230205253. The reversal of 230205245 is 542502032.

It can be written as a sum of positive squares in 4 ways, for example, as 92987449 + 137217796 = 9643^2 + 11714^2 .

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 230205245 - 26 = 230205181 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230205245.

It is a congruent number.

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, 1354064 + ... + 1354233.

It is an arithmetic number, because the mean of its divisors is an integer number (36562023).

Almost surely, 2230205245 is an apocalyptic number.

It is an amenable number.

230205245 is a deficient number, since it is larger than the sum of its proper divisors (62290939).

230205245 is a wasteful number, since it uses less digits than its factorization.

230205245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2708319.

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 230205245 is about 15172.5161064340. The cubic root of 230205245 is about 612.8747627385.

Adding to 230205245 its reverse (542502032), we get a palindrome (772707277).

The spelling of 230205245 in words is "two hundred thirty million, two hundred five thousand, two hundred forty-five".

Divisors: 1 5 17 85 2708297 13541485 46041049 230205245