51696045 has 24 divisors (see below), whose sum is σ = 90839736. Its totient is φ = 27191808.

The previous prime is 51695989. The next prime is 51696049. The reversal of 51696045 is 54069615.

51696045 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 16305444 + 35390601 = 4038^2 + 5949^2 .

It is not a de Polignac number, because 51696045 - 2⁶ = 51695981 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51696049) 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 23 ways as a sum of consecutive naturals, for example, 4584 + ... + 11153.

It is an arithmetic number, because the mean of its divisors is an integer number (3784989).

Almost surely, 2^51696045 is an apocalyptic number.

It is an amenable number.

51696045 is a deficient number, since it is larger than the sum of its proper divisors (39143691).

51696045 is a wasteful number, since it uses less digits than its factorization.

51696045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15821 (or 15818 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 36.

The square root of 51696045 is about 7189.9961752424. The cubic root of 51696045 is about 372.5224405801.

The spelling of 51696045 in words is "fifty-one million, six hundred ninety-six thousand, forty-five".