549421056 has 224 divisors, whose sum is σ = 1719114120. Its totient is φ = 175177728.

The previous prime is 549421051. The next prime is 549421057. The reversal of 549421056 is 650124945.

549421056 is a `hidden beast` number, since 549 + 4 + 2 + 105 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 549421056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549421051) by changing a digit.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 23887861 + ... + 23887883.

Almost surely, 2^549421056 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549421056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (859557060).

549421056 is an abundant number, since it is smaller than the sum of its proper divisors (1169693064).

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

549421056 is an frugal number, since it uses more digits than its factorization.

549421056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71 (or 28 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 549421056 is about 23439.7324216809. The cubic root of 549421056 is about 819.0336901973.

The spelling of 549421056 in words is "five hundred forty-nine million, four hundred twenty-one thousand, fifty-six".