424089221 has 2 divisors, whose sum is σ = 424089222. Its totient is φ = 424089220.

The previous prime is 424089151. The next prime is 424089233. The reversal of 424089221 is 122980424.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 225420196 + 198669025 = 15014^2 + 14095^2 .

It is a cyclic number.

It is not a de Polignac number, because 424089221 - 2¹⁸ = 423827077 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (424089271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212044610 + 212044611.

It is an arithmetic number, because the mean of its divisors is an integer number (212044611).

Almost surely, 2^424089221 is an apocalyptic number.

It is an amenable number.

424089221 is a deficient number, since it is larger than the sum of its proper divisors (1).

424089221 is an equidigital number, since it uses as much as digits as its factorization.

424089221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 424089221 is about 20593.4266454129. The cubic root of 424089221 is about 751.3098420496.

The spelling of 424089221 in words is "four hundred twenty-four million, eighty-nine thousand, two hundred twenty-one".