500549221 has 2 divisors, whose sum is σ = 500549222. Its totient is φ = 500549220.

The previous prime is 500549191. The next prime is 500549237. The reversal of 500549221 is 122945005.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 412658596 + 87890625 = 20314^2 + 9375^2 .

It is a cyclic number.

It is not a de Polignac number, because 500549221 - 2⁹ = 500548709 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 500549221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (500543221) 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, 250274610 + 250274611.

It is an arithmetic number, because the mean of its divisors is an integer number (250274611).

Almost surely, 2^500549221 is an apocalyptic number.

It is an amenable number.

500549221 is a deficient number, since it is larger than the sum of its proper divisors (1).

500549221 is an equidigital number, since it uses as much as digits as its factorization.

500549221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 500549221 is about 22372.9573592764. The cubic root of 500549221 is about 793.9910309735.

The spelling of 500549221 in words is "five hundred million, five hundred forty-nine thousand, two hundred twenty-one".