544251221 has 4 divisors (see below), whose sum is σ = 561807744. Its totient is φ = 526694700.

The previous prime is 544251217. The next prime is 544251229. The reversal of 544251221 is 122152445.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122152445 = 5 ⋅24430489.

It is a cyclic number.

It is not a de Polignac number, because 544251221 - 2² = 544251217 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (544251229) 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 in 3 ways as a sum of consecutive naturals, for example, 8778215 + ... + 8778276.

It is an arithmetic number, because the mean of its divisors is an integer number (140451936).

Almost surely, 2^544251221 is an apocalyptic number.

It is an amenable number.

544251221 is a deficient number, since it is larger than the sum of its proper divisors (17556523).

544251221 is a wasteful number, since it uses less digits than its factorization.

544251221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17556522.

The product of its digits is 3200, while the sum is 26.

The square root of 544251221 is about 23329.1924635209. The cubic root of 544251221 is about 816.4566625002.

The spelling of 544251221 in words is "five hundred forty-four million, two hundred fifty-one thousand, two hundred twenty-one".