551166 has 32 divisors (see below), whose sum is σ = 1375488. Its totient is φ = 143040.

The previous prime is 551143. The next prime is 551179. The reversal of 551166 is 661155.

It is an Ulam number.

It is a Curzon number.

It is a zygodrome in base 10.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 551166.

It is an unprimeable number.

551166 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (42984).

2⁵⁵¹¹⁶⁶ is an apocalyptic number.

551166 is an abundant number, since it is smaller than the sum of its proper divisors (824322).

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

551166 is a wasteful number, since it uses less digits than its factorization.

551166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1216.

The product of its digits is 900, while the sum is 24.

The square root of 551166 is about 742.4055495482. The cubic root of 551166 is about 81.9899848962.

It can be divided in two parts, 551 and 166, that added together give a palindrome (717).

The spelling of 551166 in words is "five hundred fifty-one thousand, one hundred sixty-six".