51695907 has 16 divisors (see below), whose sum is σ = 69968640. Its totient is φ = 33948000.

The previous prime is 51695887. The next prime is 51695971. The reversal of 51695907 is 70959615.

It is a de Polignac number, because none of the positive numbers 2^k-51695907 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51695107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62557 + ... + 63377.

It is an arithmetic number, because the mean of its divisors is an integer number (4373040).

Almost surely, 2^51695907 is an apocalyptic number.

51695907 is a deficient number, since it is larger than the sum of its proper divisors (18272733).

51695907 is a wasteful number, since it uses less digits than its factorization.

51695907 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1114.

The product of its (nonzero) digits is 85050, while the sum is 42.

The square root of 51695907 is about 7189.9865785688. The cubic root of 51695907 is about 372.5221091032.

The spelling of 51695907 in words is "fifty-one million, six hundred ninety-five thousand, nine hundred seven".