551444 has 12 divisors (see below), whose sum is σ = 976500. Its totient is φ = 272448.

The previous prime is 551443. The next prime is 551461. The reversal of 551444 is 444155.

It can be written as a sum of positive squares in 2 ways, for example, as 144400 + 407044 = 380^2 + 638^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 419 + ... + 1130.

It is an arithmetic number, because the mean of its divisors is an integer number (81375).

2⁵⁵¹⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

551444 is a deficient number, since it is larger than the sum of its proper divisors (425056).

551444 is a wasteful number, since it uses less digits than its factorization.

551444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1642 (or 1640 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 551444 is about 742.5927551491. The cubic root of 551444 is about 82.0037674256.

Adding to 551444 its reverse (444155), we get a palindrome (995599).

The spelling of 551444 in words is "five hundred fifty-one thousand, four hundred forty-four".