551400 has 48 divisors (see below), whose sum is σ = 1711200. Its totient is φ = 146880.

The previous prime is 551387. The next prime is 551407. The reversal of 551400 is 4155.

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

It is a self number, because there is not a number n which added to its sum of digits gives 551400.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551400.

It is not an unprimeable number, because it can be changed into a prime (551407) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 141 + ... + 1059.

It is an arithmetic number, because the mean of its divisors is an integer number (35650).

2⁵⁵¹⁴⁰⁰ is an apocalyptic number.

551400 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 551400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (855600).

551400 is an abundant number, since it is smaller than the sum of its proper divisors (1159800).

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

551400 is a wasteful number, since it uses less digits than its factorization.

551400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 938 (or 929 counting only the distinct ones).

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

The square root of 551400 is about 742.5631286295. The cubic root of 551400 is about 82.0015863266.

Adding to 551400 its reverse (4155), we get a palindrome (555555).

The spelling of 551400 in words is "five hundred fifty-one thousand, four hundred".