551128 has 8 divisors (see below), whose sum is σ = 1033380. Its totient is φ = 275560.

The previous prime is 551113. The next prime is 551129. The reversal of 551128 is 821155.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 551099 and 551108.

It is a congruent number.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34438 + ... + 34453.

2⁵⁵¹¹²⁸ is an apocalyptic number.

It is an amenable number.

551128 is a deficient number, since it is larger than the sum of its proper divisors (482252).

551128 is a wasteful number, since it uses less digits than its factorization.

551128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68897 (or 68893 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 551128 is about 742.3799566260. The cubic root of 551128 is about 81.9881005934.

It can be divided in two parts, 55112 and 8, that multiplied together give a square (440896 = 664²).

The spelling of 551128 in words is "five hundred fifty-one thousand, one hundred twenty-eight".