434423221 has 4 divisors (see below), whose sum is σ = 434480992. Its totient is φ = 434365452.

The previous prime is 434423207. The next prime is 434423257. The reversal of 434423221 is 122324434.

It is a happy number.

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-434423221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (434423261) 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, 15555 + ... + 33328.

It is an arithmetic number, because the mean of its divisors is an integer number (108620248).

Almost surely, 2^434423221 is an apocalyptic number.

It is an amenable number.

434423221 is a deficient number, since it is larger than the sum of its proper divisors (57771).

434423221 is an equidigital number, since it uses as much as digits as its factorization.

434423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57770.

The product of its digits is 4608, while the sum is 25.

The square root of 434423221 is about 20842.8218099182. The cubic root of 434423221 is about 757.3634523158.

Adding to 434423221 its reverse (122324434), we get a palindrome (556747655).

The spelling of 434423221 in words is "four hundred thirty-four million, four hundred twenty-three thousand, two hundred twenty-one".