551000440 has 16 divisors (see below), whose sum is σ = 1239751080. Its totient is φ = 220400160.

The previous prime is 551000419. The next prime is 551000453. The reversal of 551000440 is 44000155.

551000440 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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6887466 + ... + 6887545.

Almost surely, 2^551000440 is an apocalyptic number.

It is an amenable number.

551000440 is an abundant number, since it is smaller than the sum of its proper divisors (688750640).

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

551000440 is a wasteful number, since it uses less digits than its factorization.

551000440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13775022 (or 13775018 counting only the distinct ones).

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

The square root of 551000440 is about 23473.3985609242. The cubic root of 551000440 is about 819.8177465268.

Adding to 551000440 its reverse (44000155), we get a palindrome (595000595).

The spelling of 551000440 in words is "five hundred fifty-one million, four hundred forty", and thus it is an aban number.