544221 has 12 divisors (see below), whose sum is σ = 832572. Its totient is φ = 341376.

The previous prime is 544199. The next prime is 544223. The reversal of 544221 is 122445.

It can be written as a sum of positive squares in 2 ways, for example, as 236196 + 308025 = 486^2 + 555^2 .

It is not a de Polignac number, because 544221 - 2¹⁵ = 511453 is a prime.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 544194 and 544203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1626 + ... + 1931.

It is an arithmetic number, because the mean of its divisors is an integer number (69381).

2⁵⁴⁴²²¹ is an apocalyptic number.

544221 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

544221 is a deficient number, since it is larger than the sum of its proper divisors (288351).

544221 is a wasteful number, since it uses less digits than its factorization.

544221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3580 (or 3577 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 544221 is about 737.7133589681. The cubic root of 544221 is about 81.6441550243.

Adding to 544221 its reverse (122445), we get a palindrome (666666).

The spelling of 544221 in words is "five hundred forty-four thousand, two hundred twenty-one".