551347128 has 128 divisors (see below), whose sum is σ = 1652788800. Its totient is φ = 169648128.

The previous prime is 551347117. The next prime is 551347129. The reversal of 551347128 is 821743155.

551347128 is a `hidden beast` number, since 551 + 34 + 71 + 2 + 8 = 666.

551347128 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 551347092 and 551347101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (551347129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 193200 + ... + 196032.

Almost surely, 2^551347128 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 551347128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (826394400).

551347128 is an abundant number, since it is smaller than the sum of its proper divisors (1101441672).

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

551347128 is a wasteful number, since it uses less digits than its factorization.

551347128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918 (or 2908 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 551347128 is about 23480.7820994106. The cubic root of 551347128 is about 819.9896528538.

The spelling of 551347128 in words is "five hundred fifty-one million, three hundred forty-seven thousand, one hundred twenty-eight".