432431221 has 2 divisors, whose sum is σ = 432431222. Its totient is φ = 432431220.

The previous prime is 432431213. The next prime is 432431239. The reversal of 432431221 is 122134234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 325080900 + 107350321 = 18030^2 + 10361^2 .

It is a cyclic number.

It is not a de Polignac number, because 432431221 - 2³ = 432431213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 432431192 and 432431201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432431281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216215610 + 216215611.

It is an arithmetic number, because the mean of its divisors is an integer number (216215611).

Almost surely, 2^432431221 is an apocalyptic number.

It is an amenable number.

432431221 is a deficient number, since it is larger than the sum of its proper divisors (1).

432431221 is an equidigital number, since it uses as much as digits as its factorization.

432431221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1152, while the sum is 22.

The square root of 432431221 is about 20794.9806684209. The cubic root of 432431221 is about 756.2040761130.

Adding to 432431221 its reverse (122134234), we get a palindrome (554565455).

The spelling of 432431221 in words is "four hundred thirty-two million, four hundred thirty-one thousand, two hundred twenty-one".