551844 has 18 divisors (see below), whose sum is σ = 1395030. Its totient is φ = 183936.

The previous prime is 551843. The next prime is 551849. The reversal of 551844 is 448155.

It can be written as a sum of positive squares in only one way, i.e., 360000 + 191844 = 600^2 + 438^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (551843) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7629 + ... + 7700.

2⁵⁵¹⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

551844 is an abundant number, since it is smaller than the sum of its proper divisors (843186).

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

551844 is a wasteful number, since it uses less digits than its factorization.

551844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15339 (or 15334 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 551844 is about 742.8620329509. The cubic root of 551844 is about 82.0235902780.

Adding to 551844 its reverse (448155), we get a palindrome (999999).

The spelling of 551844 in words is "five hundred fifty-one thousand, eight hundred forty-four".