551500440 has 64 divisors (see below), whose sum is σ = 1726444800. Its totient is φ = 140671872.

The previous prime is 551500427. The next prime is 551500459. The reversal of 551500440 is 44005155.

551500440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 551500440.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 97150 + ... + 102669.

It is an arithmetic number, because the mean of its divisors is an integer number (26975700).

Almost surely, 2^551500440 is an apocalyptic number.

It is an amenable number.

551500440 is an abundant number, since it is smaller than the sum of its proper divisors (1174944360).

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

551500440 is a wasteful number, since it uses less digits than its factorization.

551500440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199856 (or 199852 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 551500440 is about 23484.0464996985. The cubic root of 551500440 is about 820.0656501077.

Adding to 551500440 its reverse (44005155), we get a palindrome (595505595).

The spelling of 551500440 in words is "five hundred fifty-one million, five hundred thousand, four hundred forty".