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230230291 = 673436273
BaseRepresentation
bin11011011100100…
…00100100010011
3121001012220120211
431232100210103
5432414332131
634502344551
75463632224
oct1556204423
9531186524
10230230291
11108a60475
126512b157
1338910055
142281124b
151532b5b1
hexdb90913

230230291 has 4 divisors (see below), whose sum is σ = 233666632. Its totient is φ = 226793952.

The previous prime is 230230283. The next prime is 230230307. The reversal of 230230291 is 192032032.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 230230291 - 23 = 230230283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230230591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1718070 + ... + 1718203.

It is an arithmetic number, because the mean of its divisors is an integer number (58416658).

Almost surely, 2230230291 is an apocalyptic number.

230230291 is a deficient number, since it is larger than the sum of its proper divisors (3436341).

230230291 is an equidigital number, since it uses as much as digits as its factorization.

230230291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3436340.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 230230291 is about 15173.3414579650. The cubic root of 230230291 is about 612.8969885637.

The spelling of 230230291 in words is "two hundred thirty million, two hundred thirty thousand, two hundred ninety-one".

Divisors: 1 67 3436273 230230291