231342305 has 16 divisors (see below), whose sum is σ = 287099904. Its totient is φ = 178770240.

The previous prime is 231342289. The next prime is 231342323. The reversal of 231342305 is 503243132.

It is not a de Polignac number, because 231342305 - 2⁴ = 231342289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111659 + ... + 113711.

It is an arithmetic number, because the mean of its divisors is an integer number (17943744).

Almost surely, 2^231342305 is an apocalyptic number.

It is an amenable number.

231342305 is a deficient number, since it is larger than the sum of its proper divisors (55757599).

231342305 is a wasteful number, since it uses less digits than its factorization.

231342305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2816.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 231342305 is about 15209.9409926535. The cubic root of 231342305 is about 613.8821697731.

Adding to 231342305 its reverse (503243132), we get a palindrome (734585437).

The spelling of 231342305 in words is "two hundred thirty-one million, three hundred forty-two thousand, three hundred five".