551502440 has 64 divisors (see below), whose sum is σ = 1332495360. Its totient is φ = 204682240.

The previous prime is 551502407. The next prime is 551502463. The reversal of 551502440 is 44205155.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 42569 + ... + 53991.

It is an arithmetic number, because the mean of its divisors is an integer number (20820240).

Almost surely, 2^551502440 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 551502440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (666247680).

551502440 is an abundant number, since it is smaller than the sum of its proper divisors (780992920).

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

551502440 is a wasteful number, since it uses less digits than its factorization.

551502440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11522 (or 11518 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 26.

The square root of 551502440 is about 23484.0890817592. The cubic root of 551502440 is about 820.0666414211.

Adding to 551502440 its reverse (44205155), we get a palindrome (595707595).

The spelling of 551502440 in words is "five hundred fifty-one million, five hundred two thousand, four hundred forty".