51385823 has 12 divisors (see below), whose sum is σ = 54681120. Its totient is φ = 48279456.

The previous prime is 51385819. The next prime is 51385837. The reversal of 51385823 is 32858315.

51385823 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 51385823 - 2² = 51385819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51385853) 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 11 ways as a sum of consecutive naturals, for example, 48938 + ... + 49976.

It is an arithmetic number, because the mean of its divisors is an integer number (4556760).

Almost surely, 2^51385823 is an apocalyptic number.

51385823 is a deficient number, since it is larger than the sum of its proper divisors (3295297).

51385823 is a wasteful number, since it uses less digits than its factorization.

51385823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1214 (or 1195 counting only the distinct ones).

The product of its digits is 28800, while the sum is 35.

The square root of 51385823 is about 7168.3905446062. The cubic root of 51385823 is about 371.7757903370.

The spelling of 51385823 in words is "fifty-one million, three hundred eighty-five thousand, eight hundred twenty-three".