551040 has 128 divisors (see below), whose sum is σ = 2056320. Its totient is φ = 122880.

The previous prime is 551039. The next prime is 551059. The reversal of 551040 is 40155.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13420 + ... + 13460.

It is an arithmetic number, because the mean of its divisors is an integer number (16065).

2⁵⁵¹⁰⁴⁰ 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 551040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1028160).

551040 is an abundant number, since it is smaller than the sum of its proper divisors (1505280).

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

551040 is a wasteful number, since it uses less digits than its factorization.

551040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 551040 is about 742.3206854184. The cubic root of 551040 is about 81.9837366120.

Adding to 551040 its reverse (40155), we get a palindrome (591195).

The spelling of 551040 in words is "five hundred fifty-one thousand, forty".