544893221 has 2 divisors, whose sum is σ = 544893222. Its totient is φ = 544893220.

The previous prime is 544893211. The next prime is 544893281. The reversal of 544893221 is 122398445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 529644196 + 15249025 = 23014^2 + 3905^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-544893221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (544893211) 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, 272446610 + 272446611.

It is an arithmetic number, because the mean of its divisors is an integer number (272446611).

Almost surely, 2^544893221 is an apocalyptic number.

It is an amenable number.

544893221 is a deficient number, since it is larger than the sum of its proper divisors (1).

544893221 is an equidigital number, since it uses as much as digits as its factorization.

544893221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 38.

The square root of 544893221 is about 23342.9479929164. The cubic root of 544893221 is about 816.7775677427. Note that the first 3 decimals are identical.

The spelling of 544893221 in words is "five hundred forty-four million, eight hundred ninety-three thousand, two hundred twenty-one".