51320166 has 8 divisors (see below), whose sum is σ = 102640344. Its totient is φ = 17106720.

The previous prime is 51320141. The next prime is 51320173. The reversal of 51320166 is 66102315.

51320166 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

51320166 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 4276675 + ... + 4276686.

It is an arithmetic number, because the mean of its divisors is an integer number (12830043).

Almost surely, 2^51320166 is an apocalyptic number.

51320166 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

51320166 is a wasteful number, since it uses less digits than its factorization.

51320166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8553366.

The product of its (nonzero) digits is 1080, while the sum is 24.

The square root of 51320166 is about 7163.8094614528. The cubic root of 51320166 is about 371.6173803235.

The spelling of 51320166 in words is "fifty-one million, three hundred twenty thousand, one hundred sixty-six".