544253221 has 4 divisors (see below), whose sum is σ = 544715244. Its totient is φ = 543791200.

The previous prime is 544253219. The next prime is 544253231. The reversal of 544253221 is 122352445.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 347412321 + 196840900 = 18639^2 + 14030^2 .

It is a cyclic number.

It is not a de Polignac number, because 544253221 - 2¹ = 544253219 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 544253221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544253231) 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 3 ways as a sum of consecutive naturals, for example, 229240 + ... + 231601.

It is an arithmetic number, because the mean of its divisors is an integer number (136178811).

Almost surely, 2^544253221 is an apocalyptic number.

It is an amenable number.

544253221 is a deficient number, since it is larger than the sum of its proper divisors (462023).

544253221 is a wasteful number, since it uses less digits than its factorization.

544253221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462022.

The product of its digits is 9600, while the sum is 28.

The square root of 544253221 is about 23329.2353282314. The cubic root of 544253221 is about 816.4576625968.

The spelling of 544253221 in words is "five hundred forty-four million, two hundred fifty-three thousand, two hundred twenty-one".