230111143 has 4 divisors (see below), whose sum is σ = 238046040. Its totient is φ = 222176248.

The previous prime is 230111131. The next prime is 230111149. The reversal of 230111143 is 341111032.

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 230111143 - 2⁹ = 230110631 is a prime.

It is a super-2 number, since 2×230111143² = 105902276265532898, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230111149) 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, 3967405 + ... + 3967462.

It is an arithmetic number, because the mean of its divisors is an integer number (59511510).

Almost surely, 2^230111143 is an apocalyptic number.

230111143 is a deficient number, since it is larger than the sum of its proper divisors (7934897).

230111143 is an equidigital number, since it uses as much as digits as its factorization.

230111143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7934896.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 230111143 is about 15169.4147217353. The cubic root of 230111143 is about 612.7912421956.

Adding to 230111143 its reverse (341111032), we get a palindrome (571222175).

The spelling of 230111143 in words is "two hundred thirty million, one hundred eleven thousand, one hundred forty-three".