231230305 has 4 divisors (see below), whose sum is σ = 277476372. Its totient is φ = 184984240.

The previous prime is 231230303. The next prime is 231230341. The reversal of 231230305 is 503032132.

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

It can be written as a sum of positive squares in 2 ways, for example, as 107308881 + 123921424 = 10359^2 + 11132^2 .

It is not a de Polignac number, because 231230305 - 2¹ = 231230303 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231230303) 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, 23123026 + ... + 23123035.

It is an arithmetic number, because the mean of its divisors is an integer number (69369093).

Almost surely, 2^231230305 is an apocalyptic number.

It is an amenable number.

231230305 is a deficient number, since it is larger than the sum of its proper divisors (46246067).

231230305 is an equidigital number, since it uses as much as digits as its factorization.

231230305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46246066.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 231230305 is about 15206.2587443460. The cubic root of 231230305 is about 613.7830873025.

Adding to 231230305 its reverse (503032132), we get a palindrome (734262437).

The spelling of 231230305 in words is "two hundred thirty-one million, two hundred thirty thousand, three hundred five".