432321221 has 2 divisors, whose sum is σ = 432321222. Its totient is φ = 432321220.

The previous prime is 432321217. The next prime is 432321233. The reversal of 432321221 is 122123234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 346480996 + 85840225 = 18614^2 + 9265^2 .

It is a cyclic number.

It is not a de Polignac number, because 432321221 - 2² = 432321217 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 432321193 and 432321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432321521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216160610 + 216160611.

It is an arithmetic number, because the mean of its divisors is an integer number (216160611).

Almost surely, 2^432321221 is an apocalyptic number.

It is an amenable number.

432321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

432321221 is an equidigital number, since it uses as much as digits as its factorization.

432321221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 20.

The square root of 432321221 is about 20792.3356311887. The cubic root of 432321221 is about 756.1399506918.

Adding to 432321221 its reverse (122123234), we get a palindrome (554444455).

The spelling of 432321221 in words is "four hundred thirty-two million, three hundred twenty-one thousand, two hundred twenty-one".