551224 has 8 divisors (see below), whose sum is σ = 1033560. Its totient is φ = 275608.

The previous prime is 551219. The next prime is 551231. The reversal of 551224 is 422155.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34444 + ... + 34459.

It is an arithmetic number, because the mean of its divisors is an integer number (129195).

2⁵⁵¹²²⁴ is an apocalyptic number.

It is an amenable number.

551224 is a deficient number, since it is larger than the sum of its proper divisors (482336).

551224 is a wasteful number, since it uses less digits than its factorization.

551224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68909 (or 68905 counting only the distinct ones).

The product of its digits is 400, while the sum is 19.

The square root of 551224 is about 742.4446107286. Note that the first 3 decimals coincide. The cubic root of 551224 is about 81.9928607705.

Adding to 551224 its reverse (422155), we get a palindrome (973379).

The spelling of 551224 in words is "five hundred fifty-one thousand, two hundred twenty-four".