51800619 has 16 divisors (see below), whose sum is σ = 75152672. Its totient is φ = 31546368.

The previous prime is 51800611. The next prime is 51800647. The reversal of 51800619 is 91600815.

It is a happy number.

51800619 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51800619 - 2³ = 51800611 is a prime.

It is a super-2 number, since 2×51800619² = 5366608257566322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51800611) 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, 3064 + ... + 10629.

It is an arithmetic number, because the mean of its divisors is an integer number (4697042).

Almost surely, 2^51800619 is an apocalyptic number.

51800619 is a deficient number, since it is larger than the sum of its proper divisors (23352053).

51800619 is a wasteful number, since it uses less digits than its factorization.

51800619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13806.

The product of its (nonzero) digits is 2160, while the sum is 30.

The square root of 51800619 is about 7197.2646887550. The cubic root of 51800619 is about 372.7734586450.

The spelling of 51800619 in words is "fifty-one million, eight hundred thousand, six hundred nineteen".