51680109 has 16 divisors (see below), whose sum is σ = 75935552. Its totient is φ = 31062528.

The previous prime is 51680093. The next prime is 51680113. The reversal of 51680109 is 90108615.

It is a happy number.

51680109 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 51680109 - 2⁴ = 51680093 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51680129) 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, 13732 + ... + 17085.

It is an arithmetic number, because the mean of its divisors is an integer number (4745972).

Almost surely, 2^51680109 is an apocalyptic number.

It is an amenable number.

51680109 is a deficient number, since it is larger than the sum of its proper divisors (24255443).

51680109 is a wasteful number, since it uses less digits than its factorization.

51680109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30876.

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

The square root of 51680109 is about 7188.8878833934. The cubic root of 51680109 is about 372.4841582981.

The spelling of 51680109 in words is "fifty-one million, six hundred eighty thousand, one hundred nine".