4231232321 has 2 divisors, whose sum is σ = 4231232322. Its totient is φ = 4231232320.

The previous prime is 4231232297. The next prime is 4231232363. The reversal of 4231232321 is 1232321324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2974175296 + 1257057025 = 54536^2 + 35455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4231232321 is a prime.

It is not a weakly prime, because it can be changed into another prime (4231232521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2115616160 + 2115616161.

It is an arithmetic number, because the mean of its divisors is an integer number (2115616161).

Almost surely, 2^4231232321 is an apocalyptic number.

It is an amenable number.

4231232321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4231232321 is an equidigital number, since it uses as much as digits as its factorization.

4231232321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 4231232321 is about 65047.9232643134. The cubic root of 4231232321 is about 1617.4180688489.

Adding to 4231232321 its reverse (1232321324), we get a palindrome (5463553645).

The spelling of 4231232321 in words is "four billion, two hundred thirty-one million, two hundred thirty-two thousand, three hundred twenty-one".