51821106 has 32 divisors (see below), whose sum is σ = 106539840. Its totient is φ = 16794624.

The previous prime is 51821071. The next prime is 51821129. The reversal of 51821106 is 60112815.

51821106 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 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 15 ways as a sum of consecutive naturals, for example, 90790 + ... + 91358.

It is an arithmetic number, because the mean of its divisors is an integer number (3329370).

Almost surely, 2^51821106 is an apocalyptic number.

51821106 is an abundant number, since it is smaller than the sum of its proper divisors (54718734).

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

51821106 is a wasteful number, since it uses less digits than its factorization.

51821106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 970.

The product of its (nonzero) digits is 480, while the sum is 24.

The square root of 51821106 is about 7198.6877970919. The cubic root of 51821106 is about 372.8225957879.

The spelling of 51821106 in words is "fifty-one million, eight hundred twenty-one thousand, one hundred six".