551004 has 48 divisors (see below), whose sum is σ = 1417248. Its totient is φ = 165888.

The previous prime is 551003. The next prime is 551017. The reversal of 551004 is 400155.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7512 + ... + 7584.

It is an arithmetic number, because the mean of its divisors is an integer number (29526).

2⁵⁵¹⁰⁰⁴ 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 551004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (708624).

551004 is an abundant number, since it is smaller than the sum of its proper divisors (866244).

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

551004 is a wasteful number, since it uses less digits than its factorization.

551004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134 (or 132 counting only the distinct ones).

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

The square root of 551004 is about 742.2964367421. The cubic root of 551004 is about 81.9819512130.

Adding to 551004 its reverse (400155), we get a palindrome (951159).

The spelling of 551004 in words is "five hundred fifty-one thousand, four".