230640443 has 4 divisors (see below), whose sum is σ = 251607768. Its totient is φ = 209673120.

The previous prime is 230640439. The next prime is 230640461. The reversal of 230640443 is 344046032.

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 230640443 - 2² = 230640439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (230640463) 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, 10483646 + ... + 10483667.

It is an arithmetic number, because the mean of its divisors is an integer number (62901942).

Almost surely, 2^230640443 is an apocalyptic number.

230640443 is a deficient number, since it is larger than the sum of its proper divisors (20967325).

230640443 is a wasteful number, since it uses less digits than its factorization.

230640443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20967324.

The product of its (nonzero) digits is 6912, while the sum is 26.

The square root of 230640443 is about 15186.8509902481. The cubic root of 230640443 is about 613.2607284159.

Adding to 230640443 its reverse (344046032), we get a palindrome (574686475).

The spelling of 230640443 in words is "two hundred thirty million, six hundred forty thousand, four hundred forty-three".