51685727 has 8 divisors (see below), whose sum is σ = 52652880. Its totient is φ = 50722560.

The previous prime is 51685723. The next prime is 51685741. The reversal of 51685727 is 72758615.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51685727 - 2² = 51685723 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 (51685723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40424 + ... + 41682.

It is an arithmetic number, because the mean of its divisors is an integer number (6581610).

Almost surely, 2^51685727 is an apocalyptic number.

51685727 is a deficient number, since it is larger than the sum of its proper divisors (967153).

51685727 is a wasteful number, since it uses less digits than its factorization.

51685727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1993.

The product of its digits is 117600, while the sum is 41.

The square root of 51685727 is about 7189.2786147151. The cubic root of 51685727 is about 372.4976550458.

The spelling of 51685727 in words is "fifty-one million, six hundred eighty-five thousand, seven hundred twenty-seven".