230643155 has 4 divisors (see below), whose sum is σ = 276771792. Its totient is φ = 184514520.

The previous prime is 230643151. The next prime is 230643167. The reversal of 230643155 is 551346032.

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

It is not a de Polignac number, because 230643155 - 2² = 230643151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230643151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23064311 + ... + 23064320.

It is an arithmetic number, because the mean of its divisors is an integer number (69192948).

Almost surely, 2^230643155 is an apocalyptic number.

230643155 is a deficient number, since it is larger than the sum of its proper divisors (46128637).

230643155 is an equidigital number, since it uses as much as digits as its factorization.

230643155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46128636.

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 230643155 is about 15186.9402777518. The cubic root of 230643155 is about 613.2631320946.

Adding to 230643155 its reverse (551346032), we get a palindrome (781989187).

The spelling of 230643155 in words is "two hundred thirty million, six hundred forty-three thousand, one hundred fifty-five".