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230120305 = 5194356333
BaseRepresentation
bin11011011011101…
…01101101110001
3121001000022201021
431231311231301
5432402322210
634500135441
75462663452
oct1555655561
9531008637
10230120305
11108995878
1265097581
13388a1c7c
14227c3129
1515308bda
hexdb75b71

230120305 has 16 divisors (see below), whose sum is σ = 297443520. Its totient is φ = 170347968.

The previous prime is 230120291. The next prime is 230120311. The reversal of 230120305 is 503021032.

It is a cyclic number.

It is not a de Polignac number, because 230120305 - 25 = 230120273 is a prime.

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, 24082 + ... + 32251.

It is an arithmetic number, because the mean of its divisors is an integer number (18590220).

Almost surely, 2230120305 is an apocalyptic number.

It is an amenable number.

230120305 is a deficient number, since it is larger than the sum of its proper divisors (67323215).

230120305 is a wasteful number, since it uses less digits than its factorization.

230120305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56400.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 230120305 is about 15169.7167079679. The cubic root of 230120305 is about 612.7993749596.

Adding to 230120305 its reverse (503021032), we get a palindrome (733141337).

The spelling of 230120305 in words is "two hundred thirty million, one hundred twenty thousand, three hundred five".

Divisors: 1 5 19 43 95 215 817 4085 56333 281665 1070327 2422319 5351635 12111595 46024061 230120305