551345440 has 24 divisors (see below), whose sum is σ = 1302553980. Its totient is φ = 220538112.

The previous prime is 551345429. The next prime is 551345449. The reversal of 551345440 is 44543155.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 520387344 + 30958096 = 22812^2 + 5564^2 .

It is not an unprimeable number, because it can be changed into a prime (551345449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1722795 + ... + 1723114.

Almost surely, 2^551345440 is an apocalyptic number.

It is an amenable number.

551345440 is an abundant number, since it is smaller than the sum of its proper divisors (751208540).

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

551345440 is a wasteful number, since it uses less digits than its factorization.

551345440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445924 (or 3445916 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 31.

The square root of 551345440 is about 23480.7461550948. The cubic root of 551345440 is about 819.9888160283.

Adding to 551345440 its reverse (44543155), we get a palindrome (595888595).

The spelling of 551345440 in words is "five hundred fifty-one million, three hundred forty-five thousand, four hundred forty".