551017440 has 288 divisors, whose sum is σ = 1992646656. Its totient is φ = 138378240.

The previous prime is 551017421. The next prime is 551017469. The reversal of 551017440 is 44710155.

It is a happy number.

551017440 is a `hidden beast` number, since 551 + 0 + 1 + 74 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4206175 + ... + 4206305.

It is an arithmetic number, because the mean of its divisors is an integer number (6918912).

Almost surely, 2^551017440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551017440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (996323328).

551017440 is an abundant number, since it is smaller than the sum of its proper divisors (1441629216).

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

551017440 is a wasteful number, since it uses less digits than its factorization.

551017440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 302 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 551017440 is about 23473.7606701611. The cubic root of 551017440 is about 819.8261777109.

Adding to 551017440 its reverse (44710155), we get a palindrome (595727595).

The spelling of 551017440 in words is "five hundred fifty-one million, seventeen thousand, four hundred forty".