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230047145 = 5172706437
BaseRepresentation
bin11011011011000…
…11110110101001
3121000212121100122
431231203312221
5432343002040
634454413025
75462240246
oct1555436651
9530777318
10230047145
11108945909
1265061175
1338877893
14227a45cd
15152e21b5
hexdb63da9

230047145 has 8 divisors (see below), whose sum is σ = 292295304. Its totient is φ = 173211904.

The previous prime is 230047121. The next prime is 230047151. The reversal of 230047145 is 541740032.

It can be written as a sum of positive squares in 4 ways, for example, as 105925264 + 124121881 = 10292^2 + 11141^2 .

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 230047145 - 214 = 230030761 is a prime.

It is a Duffinian 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, 1353134 + ... + 1353303.

It is an arithmetic number, because the mean of its divisors is an integer number (36536913).

Almost surely, 2230047145 is an apocalyptic number.

It is an amenable number.

230047145 is a deficient number, since it is larger than the sum of its proper divisors (62248159).

230047145 is a wasteful number, since it uses less digits than its factorization.

230047145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2706459.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 230047145 is about 15167.3051330815. The cubic root of 230047145 is about 612.7344275485.

Adding to 230047145 its reverse (541740032), we get a palindrome (771787177).

The spelling of 230047145 in words is "two hundred thirty million, forty-seven thousand, one hundred forty-five".

Divisors: 1 5 17 85 2706437 13532185 46009429 230047145