432213421 has 2 divisors, whose sum is σ = 432213422. Its totient is φ = 432213420.

The previous prime is 432213403. The next prime is 432213433. The reversal of 432213421 is 124312234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 431185225 + 1028196 = 20765^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 432213421 - 2¹⁵ = 432180653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 432213392 and 432213401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (432213451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 216106710 + 216106711.

It is an arithmetic number, because the mean of its divisors is an integer number (216106711).

Almost surely, 2^432213421 is an apocalyptic number.

It is an amenable number.

432213421 is a deficient number, since it is larger than the sum of its proper divisors (1).

432213421 is an equidigital number, since it uses as much as digits as its factorization.

432213421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 432213421 is about 20789.7431682068. The cubic root of 432213421 is about 756.0770972249.

Adding to 432213421 its reverse (124312234), we get a palindrome (556525655).

The spelling of 432213421 in words is "four hundred thirty-two million, two hundred thirteen thousand, four hundred twenty-one".