51695951 has 4 divisors (see below), whose sum is σ = 53478600. Its totient is φ = 49913304.

The previous prime is 51695887. The next prime is 51695971. The reversal of 51695951 is 15959615.

51695951 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 a cyclic number.

It is not a de Polignac number, because 51695951 - 2⁶ = 51695887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51695899 and 51695908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51695971) 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, 891281 + ... + 891338.

It is an arithmetic number, because the mean of its divisors is an integer number (13369650).

Almost surely, 2^51695951 is an apocalyptic number.

51695951 is a deficient number, since it is larger than the sum of its proper divisors (1782649).

51695951 is a wasteful number, since it uses less digits than its factorization.

51695951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782648.

The product of its digits is 60750, while the sum is 41.

The square root of 51695951 is about 7189.9896383792. The cubic root of 51695951 is about 372.5222147915.

The spelling of 51695951 in words is "fifty-one million, six hundred ninety-five thousand, nine hundred fifty-one".