432222221 has 4 divisors (see below), whose sum is σ = 433749792. Its totient is φ = 430694652.

The previous prime is 432222211. The next prime is 432222247. The reversal of 432222221 is 122222234.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-432222221 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 432222193 and 432222202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (432222211) 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, 763361 + ... + 763926.

It is an arithmetic number, because the mean of its divisors is an integer number (108437448).

Almost surely, 2^432222221 is an apocalyptic number.

It is an amenable number.

432222221 is a deficient number, since it is larger than the sum of its proper divisors (1527571).

432222221 is a wasteful number, since it uses less digits than its factorization.

432222221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1527570.

The product of its digits is 768, while the sum is 20.

The square root of 432222221 is about 20789.9548099557. The cubic root of 432222221 is about 756.0822285119.

Adding to 432222221 its reverse (122222234), we get a palindrome (554444455).

The spelling of 432222221 in words is "four hundred thirty-two million, two hundred twenty-two thousand, two hundred twenty-one".