432320321 has 4 divisors (see below), whose sum is σ = 444004692. Its totient is φ = 420635952.

The previous prime is 432320309. The next prime is 432320333. The reversal of 432320321 is 123023234.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (432320309) and next prime (432320333).

It can be written as a sum of positive squares in 2 ways, for example, as 223084096 + 209236225 = 14936^2 + 14465^2 .

It is a cyclic number.

It is not a de Polignac number, because 432320321 - 2⁶ = 432320257 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 432320293 and 432320302.

It is not an unprimeable number, because it can be changed into a prime (432320341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5842130 + ... + 5842203.

It is an arithmetic number, because the mean of its divisors is an integer number (111001173).

Almost surely, 2^432320321 is an apocalyptic number.

It is an amenable number.

432320321 is a deficient number, since it is larger than the sum of its proper divisors (11684371).

432320321 is a wasteful number, since it uses less digits than its factorization.

432320321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11684370.

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

The square root of 432320321 is about 20792.3139885872. The cubic root of 432320321 is about 756.1394259844.

Adding to 432320321 its reverse (123023234), we get a palindrome (555343555).

The spelling of 432320321 in words is "four hundred thirty-two million, three hundred twenty thousand, three hundred twenty-one".