551805428 has 12 divisors (see below), whose sum is σ = 969508512. Its totient is φ = 274803000.

The previous prime is 551805413. The next prime is 551805437. The reversal of 551805428 is 824508155.

551805428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 551805391 and 551805400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273800 + ... + 275807.

It is an arithmetic number, because the mean of its divisors is an integer number (80792376).

Almost surely, 2^551805428 is an apocalyptic number.

It is an amenable number.

551805428 is a deficient number, since it is larger than the sum of its proper divisors (417703084).

551805428 is a wasteful number, since it uses less digits than its factorization.

551805428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549862 (or 549860 counting only the distinct ones).

The product of its (nonzero) digits is 64000, while the sum is 38.

The square root of 551805428 is about 23490.5391168445. The cubic root of 551805428 is about 820.2167917773.

The spelling of 551805428 in words is "five hundred fifty-one million, eight hundred five thousand, four hundred twenty-eight".