434313221 has 2 divisors, whose sum is σ = 434313222. Its totient is φ = 434313220.

The previous prime is 434313179. The next prime is 434313223. The reversal of 434313221 is 122313434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 423330625 + 10982596 = 20575^2 + 3314^2 .

It is a cyclic number.

It is not a de Polignac number, because 434313221 - 2²² = 430118917 is a prime.

Together with 434313223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434313223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 217156610 + 217156611.

It is an arithmetic number, because the mean of its divisors is an integer number (217156611).

Almost surely, 2^434313221 is an apocalyptic number.

It is an amenable number.

434313221 is a deficient number, since it is larger than the sum of its proper divisors (1).

434313221 is an equidigital number, since it uses as much as digits as its factorization.

434313221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 23.

The square root of 434313221 is about 20840.1828446873. The cubic root of 434313221 is about 757.2995230963.

Adding to 434313221 its reverse (122313434), we get a palindrome (556626655).

The spelling of 434313221 in words is "four hundred thirty-four million, three hundred thirteen thousand, two hundred twenty-one".