51800406 has 32 divisors (see below), whose sum is σ = 118886400. Its totient is φ = 14739456.

The previous prime is 51800401. The next prime is 51800429. The reversal of 51800406 is 60400815.

51800406 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 not an unprimeable number, because it can be changed into a prime (51800401) by changing a digit.

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, 8395 + ... + 13193.

It is an arithmetic number, because the mean of its divisors is an integer number (3715200).

Almost surely, 2^51800406 is an apocalyptic number.

51800406 is an abundant number, since it is smaller than the sum of its proper divisors (67085994).

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

51800406 is a wasteful number, since it uses less digits than its factorization.

51800406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5068.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 51800406 is about 7197.2498914516. The cubic root of 51800406 is about 372.7729477060.

The spelling of 51800406 in words is "fifty-one million, eight hundred thousand, four hundred six".