551449800 has 144 divisors (see below), whose sum is σ = 2020384080. Its totient is φ = 133680000.

The previous prime is 551449781. The next prime is 551449837. The reversal of 551449800 is 8944155.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5875 + ... + 33725.

It is an arithmetic number, because the mean of its divisors is an integer number (14030445).

Almost surely, 2^551449800 is an apocalyptic number.

551449800 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 551449800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1010192040).

551449800 is an abundant number, since it is smaller than the sum of its proper divisors (1468934280).

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

551449800 is a wasteful number, since it uses less digits than its factorization.

551449800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27884 (or 27872 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 551449800 is about 23482.9682961929. The cubic root of 551449800 is about 820.0405492540.

The spelling of 551449800 in words is "five hundred fifty-one million, four hundred forty-nine thousand, eight hundred".