430961221 has 2 divisors, whose sum is σ = 430961222. Its totient is φ = 430961220.

The previous prime is 430961213. The next prime is 430961233. The reversal of 430961221 is 122169034.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 405821025 + 25140196 = 20145^2 + 5014^2 .

It is a cyclic number.

It is not a de Polignac number, because 430961221 - 2³ = 430961213 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 430961221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (434961221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 215480610 + 215480611.

It is an arithmetic number, because the mean of its divisors is an integer number (215480611).

Almost surely, 2^430961221 is an apocalyptic number.

It is an amenable number.

430961221 is a deficient number, since it is larger than the sum of its proper divisors (1).

430961221 is an equidigital number, since it uses as much as digits as its factorization.

430961221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 430961221 is about 20759.6055116662. The cubic root of 430961221 is about 755.3462271804.

The spelling of 430961221 in words is "four hundred thirty million, nine hundred sixty-one thousand, two hundred twenty-one".