230443021 has 4 divisors (see below), whose sum is σ = 235346112. Its totient is φ = 225539932.

The previous prime is 230443009. The next prime is 230443027. The reversal of 230443021 is 120344032.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 230443021 - 2²⁵ = 196888589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 230443021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (230443027) 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, 2451475 + ... + 2451568.

It is an arithmetic number, because the mean of its divisors is an integer number (58836528).

Almost surely, 2^230443021 is an apocalyptic number.

It is an amenable number.

230443021 is a deficient number, since it is larger than the sum of its proper divisors (4903091).

230443021 is an equidigital number, since it uses as much as digits as its factorization.

230443021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4903090.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 230443021 is about 15180.3498312786. The cubic root of 230443021 is about 613.0857002509.

Adding to 230443021 its reverse (120344032), we get a palindrome (350787053).

The spelling of 230443021 in words is "two hundred thirty million, four hundred forty-three thousand, twenty-one".