432243021 has 8 divisors (see below), whose sum is σ = 658656064. Its totient is φ = 246996000.

The previous prime is 432242981. The next prime is 432243029. The reversal of 432243021 is 120342234.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 432243021 - 2⁶ = 432242957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 20583001 = 432243021 / (4 + 3 + 2 + 2 + 4 + 3 + 0 + 2 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432243029) 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 7 ways as a sum of consecutive naturals, for example, 10291480 + ... + 10291521.

It is an arithmetic number, because the mean of its divisors is an integer number (82332008).

Almost surely, 2^432243021 is an apocalyptic number.

It is an amenable number.

432243021 is a deficient number, since it is larger than the sum of its proper divisors (226413043).

432243021 is a wasteful number, since it uses less digits than its factorization.

432243021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20583011.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 432243021 is about 20790.4550455251. The cubic root of 432243021 is about 756.0943567315.

Adding to 432243021 its reverse (120342234), we get a palindrome (552585255).

The spelling of 432243021 in words is "four hundred thirty-two million, two hundred forty-three thousand, twenty-one".