51695823 has 4 divisors (see below), whose sum is σ = 68927768. Its totient is φ = 34463880.

The previous prime is 51695821. The next prime is 51695837. The reversal of 51695823 is 32859615.

51695823 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 is not a de Polignac number, because 51695823 - 2¹ = 51695821 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 (51695821) 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, 8615968 + ... + 8615973.

It is an arithmetic number, because the mean of its divisors is an integer number (17231942).

Almost surely, 2^51695823 is an apocalyptic number.

51695823 is a deficient number, since it is larger than the sum of its proper divisors (17231945).

51695823 is a wasteful number, since it uses less digits than its factorization.

51695823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17231944.

The product of its digits is 64800, while the sum is 39.

The square root of 51695823 is about 7189.9807371091. The cubic root of 51695823 is about 372.5219073343.

The spelling of 51695823 in words is "fifty-one million, six hundred ninety-five thousand, eight hundred twenty-three".