551021204 has 24 divisors (see below), whose sum is σ = 1074749760. Its totient is φ = 245655936.

The previous prime is 551021203. The next prime is 551021213. The reversal of 551021204 is 402120155.

551021204 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551021201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 211952 + ... + 214535.

It is an arithmetic number, because the mean of its divisors is an integer number (44781240).

Almost surely, 2^551021204 is an apocalyptic number.

It is an amenable number.

551021204 is a deficient number, since it is larger than the sum of its proper divisors (523728556).

551021204 is a wasteful number, since it uses less digits than its factorization.

551021204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426527 (or 426525 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 551021204 is about 23473.8408446509. The cubic root of 551021204 is about 819.8280444508.

Adding to 551021204 its reverse (402120155), we get a palindrome (953141359).

The spelling of 551021204 in words is "five hundred fifty-one million, twenty-one thousand, two hundred four".