432323021 has 8 divisors (see below), whose sum is σ = 468272280. Its totient is φ = 396758592.

The previous prime is 432322991. The next prime is 432323027. The reversal of 432323021 is 120323234.

It can be written as a sum of positive squares in 4 ways, for example, as 71740900 + 360582121 = 8470^2 + 18989^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-432323021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 432322984 and 432323002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432323027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93866 + ... + 98363.

It is an arithmetic number, because the mean of its divisors is an integer number (58534035).

Almost surely, 2^432323021 is an apocalyptic number.

It is an amenable number.

432323021 is a deficient number, since it is larger than the sum of its proper divisors (35949259).

432323021 is a wasteful number, since it uses less digits than its factorization.

432323021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192415.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 432323021 is about 20792.3789163241. The cubic root of 432323021 is about 756.1410001044.

Adding to 432323021 its reverse (120323234), we get a palindrome (552646255).

The spelling of 432323021 in words is "four hundred thirty-two million, three hundred twenty-three thousand, twenty-one".