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230140145 = 5131351359
BaseRepresentation
bin11011011011110…
…10100011110001
3121001001022221002
431231322203301
5432403441040
634500411345
75463105344
oct1555724361
9531038832
10230140145
111089a9774
12650a6b55
13388ab001
14227ca45b
151530ea15
hexdb7a8f1

230140145 has 8 divisors (see below), whose sum is σ = 278277120. Its totient is φ = 182706160.

The previous prime is 230140087. The next prime is 230140223. The reversal of 230140145 is 541041032.

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

It is not a de Polignac number, because 230140145 - 26 = 230140081 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, 175025 + ... + 176334.

It is an arithmetic number, because the mean of its divisors is an integer number (34784640).

Almost surely, 2230140145 is an apocalyptic number.

It is an amenable number.

230140145 is a deficient number, since it is larger than the sum of its proper divisors (48136975).

230140145 is a wasteful number, since it uses less digits than its factorization.

230140145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351495.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 230140145 is about 15170.3706283004. The cubic root of 230140145 is about 612.8169854441.

Adding to 230140145 its reverse (541041032), we get a palindrome (771181177).

The spelling of 230140145 in words is "two hundred thirty million, one hundred forty thousand, one hundred forty-five".

Divisors: 1 5 131 655 351359 1756795 46028029 230140145