551120 has 30 divisors (see below), whose sum is σ = 1296978. Its totient is φ = 217792.

The previous prime is 551113. The next prime is 551129. The reversal of 551120 is 21155.

It can be written as a sum of positive squares in only one way, i.e., 440896 + 110224 = 664^2 + 332^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 551095 and 551104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551129) by changing a digit.

551120 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6599 + ... + 6681.

2⁵⁵¹¹²⁰ 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 551120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (648489).

551120 is an abundant number, since it is smaller than the sum of its proper divisors (745858).

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

551120 is an equidigital number, since it uses as much as digits as its factorization.

551120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179 (or 90 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 551120 is about 742.3745685299. The cubic root of 551120 is about 81.9877038870.

Adding to 551120 its reverse (21155), we get a palindrome (572275).

The spelling of 551120 in words is "five hundred fifty-one thousand, one hundred twenty".