55430166 has 64 divisors (see below), whose sum is σ = 129392640. Its totient is φ = 15644160.

The previous prime is 55430159. The next prime is 55430203. The reversal of 55430166 is 66103455.

55430166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 142300 + ... + 142688.

It is an arithmetic number, because the mean of its divisors is an integer number (2021760).

Almost surely, 2^55430166 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55430166, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64696320).

55430166 is an abundant number, since it is smaller than the sum of its proper divisors (73962474).

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

55430166 is a wasteful number, since it uses less digits than its factorization.

55430166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 55430166 is about 7445.1437863885. The cubic root of 55430166 is about 381.2841275192.

Subtracting 55430166 from its reverse (66103455), we obtain a square (10673289 = 3267²).

The spelling of 55430166 in words is "fifty-five million, four hundred thirty thousand, one hundred sixty-six".