51347885 has 4 divisors (see below), whose sum is σ = 61617468. Its totient is φ = 41078304.

The previous prime is 51347833. The next prime is 51347887. The reversal of 51347885 is 58874315.

51347885 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 36747844 + 14600041 = 6062^2 + 3821^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51347885 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 (51347887) 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 3 ways as a sum of consecutive naturals, for example, 5134784 + ... + 5134793.

It is an arithmetic number, because the mean of its divisors is an integer number (15404367).

Almost surely, 2^51347885 is an apocalyptic number.

It is an amenable number.

51347885 is a deficient number, since it is larger than the sum of its proper divisors (10269583).

51347885 is a wasteful number, since it uses less digits than its factorization.

51347885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10269582.

The product of its digits is 134400, while the sum is 41.

The square root of 51347885 is about 7165.7438553161. The cubic root of 51347885 is about 371.6842741585.

The spelling of 51347885 in words is "fifty-one million, three hundred forty-seven thousand, eight hundred eighty-five".