551021120 has 168 divisors, whose sum is σ = 1485936576. Its totient is φ = 194168832.

The previous prime is 551021117. The next prime is 551021137. The reversal of 551021120 is 21120155.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1243619 + ... + 1244061.

Almost surely, 2^551021120 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 551021120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (742968288).

551021120 is an abundant number, since it is smaller than the sum of its proper divisors (934915456).

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

551021120 is a wasteful number, since it uses less digits than its factorization.

551021120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509 (or 486 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 551021120 is about 23473.8390554251. The cubic root of 551021120 is about 819.8280027914.

Adding to 551021120 its reverse (21120155), we get a palindrome (572141275).

The spelling of 551021120 in words is "five hundred fifty-one million, twenty-one thousand, one hundred twenty".