551004000 has 384 divisors, whose sum is σ = 1989816192. Its totient is φ = 132710400.

The previous prime is 551003977. The next prime is 551004007. The reversal of 551004000 is 400155.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551004007) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7547964 + ... + 7548036.

It is an arithmetic number, because the mean of its divisors is an integer number (5181813).

Almost surely, 2^551004000 is an apocalyptic number.

551004000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 551004000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (994908096).

551004000 is an abundant number, since it is smaller than the sum of its proper divisors (1438812192).

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

551004000 is a wasteful number, since it uses less digits than its factorization.

551004000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 137 counting only the distinct ones).

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

The square root of 551004000 is about 23473.4743913209. The cubic root of 551004000 is about 819.8195121303.

Adding to 551004000 its reverse (400155), we get a palindrome (551404155).

The spelling of 551004000 in words is "five hundred fifty-one million, four thousand".