549100 has 54 divisors (see below), whose sum is σ = 1332380. Its totient is φ = 195840.

The previous prime is 549097. The next prime is 549121. The reversal of 549100 is 1945.

549100 is nontrivially palindromic in base 9.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 28891 + ... + 28909.

2⁵⁴⁹¹⁰⁰ is an apocalyptic number.

549100 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 549100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666190).

549100 is an abundant number, since it is smaller than the sum of its proper divisors (783280).

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

549100 is a wasteful number, since it uses less digits than its factorization.

549100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 43 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 549100 is about 741.0128204019. The cubic root of 549100 is about 81.8874124103.

Subtracting from 549100 its sum of digits (19), we obtain a square (549081 = 741²).

Multiplying 549100 by its sum of digits (19), we get a square (10432900 = 3230²).

549100 divided by its sum of digits (19) gives a square (28900 = 170²).

The spelling of 549100 in words is "five hundred forty-nine thousand, one hundred".