549216 has 36 divisors (see below), whose sum is σ = 1562652. Its totient is φ = 182976.

The previous prime is 549203. The next prime is 549221. The reversal of 549216 is 612945.

It is a tau number, because it is divible by the number of its divisors (36).

It is an alternating number because its digits alternate between odd and even.

It is a self number, because there is not a number n which added to its sum of digits gives 549216.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 549216.

It is an unprimeable number.

549216 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 666 + ... + 1241.

It is an arithmetic number, because the mean of its divisors is an integer number (43407).

2⁵⁴⁹²¹⁶ is an apocalyptic number.

It is an amenable number.

549216 is an abundant number, since it is smaller than the sum of its proper divisors (1013436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

549216 is a wasteful number, since it uses less digits than its factorization.

549216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1923 (or 1912 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 549216 is about 741.0910875189. The cubic root of 549216 is about 81.8931783734.

The spelling of 549216 in words is "five hundred forty-nine thousand, two hundred sixteen".