51748109 has 8 divisors (see below), whose sum is σ = 60583488. Its totient is φ = 43273440.

The previous prime is 51748079. The next prime is 51748111. The reversal of 51748109 is 90184715.

51748109 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.

It is not a de Polignac number, because 51748109 - 2²⁰ = 50699533 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51748139) 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 7 ways as a sum of consecutive naturals, for example, 89867 + ... + 90440.

It is an arithmetic number, because the mean of its divisors is an integer number (7572936).

Almost surely, 2^51748109 is an apocalyptic number.

It is an amenable number.

51748109 is a deficient number, since it is larger than the sum of its proper divisors (8835379).

51748109 is a wasteful number, since it uses less digits than its factorization.

51748109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 180355.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 51748109 is about 7193.6158501827. The cubic root of 51748109 is about 372.6474565974.

The spelling of 51748109 in words is "fifty-one million, seven hundred forty-eight thousand, one hundred nine".