504225221 has 2 divisors, whose sum is σ = 504225222. Its totient is φ = 504225220.

The previous prime is 504225217. The next prime is 504225263. The reversal of 504225221 is 122522405.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 372297025 + 131928196 = 19295^2 + 11486^2 .

It is a cyclic number.

It is not a de Polignac number, because 504225221 - 2² = 504225217 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 (504225521) 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, 252112610 + 252112611.

It is an arithmetic number, because the mean of its divisors is an integer number (252112611).

Almost surely, 2^504225221 is an apocalyptic number.

It is an amenable number.

504225221 is a deficient number, since it is larger than the sum of its proper divisors (1).

504225221 is an equidigital number, since it uses as much as digits as its factorization.

504225221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 504225221 is about 22454.9598307367. The cubic root of 504225221 is about 795.9299645670.

Adding to 504225221 its reverse (122522405), we get a palindrome (626747626).

The spelling of 504225221 in words is "five hundred four million, two hundred twenty-five thousand, two hundred twenty-one".