549550 has 24 divisors (see below), whose sum is σ = 1060200. Its totient is φ = 211680.

The previous prime is 549547. The next prime is 549551. The reversal of 549550 is 55945.

549550 = T₁₈₀ + T₁₈₁ + ... + T₂₀₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (549551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1261 + ... + 1639.

It is an arithmetic number, because the mean of its divisors is an integer number (44175).

2⁵⁴⁹⁵⁵⁰ is an apocalyptic number.

549550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

549550 is a deficient number, since it is larger than the sum of its proper divisors (510650).

549550 is a wasteful number, since it uses less digits than its factorization.

549550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420 (or 415 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

The square root of 549550 is about 741.3163966890. The cubic root of 549550 is about 81.9097758376.

It can be divided in two parts, 54 and 9550, that added together give a square (9604 = 98²).

The spelling of 549550 in words is "five hundred forty-nine thousand, five hundred fifty".