549217 has 4 divisors (see below), whose sum is σ = 573120. Its totient is φ = 525316.

The previous prime is 549203. The next prime is 549221. The reversal of 549217 is 712945.

It is a happy number.

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: 712945 = 5 ⋅142589.

It is a cyclic number.

It is not a de Polignac number, because 549217 - 2⁷ = 549089 is a prime.

It is a Duffinian number.

549217 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (549247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11917 + ... + 11962.

It is an arithmetic number, because the mean of its divisors is an integer number (143280).

2⁵⁴⁹²¹⁷ is an apocalyptic number.

It is an amenable number.

549217 is a deficient number, since it is larger than the sum of its proper divisors (23903).

549217 is a wasteful number, since it uses less digits than its factorization.

549217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23902.

The product of its digits is 2520, while the sum is 28.

The square root of 549217 is about 741.0917621995. The cubic root of 549217 is about 81.8932280764.

The spelling of 549217 in words is "five hundred forty-nine thousand, two hundred seventeen".