51986585 has 16 divisors (see below), whose sum is σ = 72276096. Its totient is φ = 35157888.

The previous prime is 51986581. The next prime is 51986609. The reversal of 51986585 is 58568915.

It is a cyclic number.

It is not a de Polignac number, because 51986585 - 2² = 51986581 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51986581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7619 + ... + 12728.

It is an arithmetic number, because the mean of its divisors is an integer number (4517256).

Almost surely, 2^51986585 is an apocalyptic number.

It is an amenable number.

51986585 is a deficient number, since it is larger than the sum of its proper divisors (20289511).

51986585 is a wasteful number, since it uses less digits than its factorization.

51986585 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20432.

The product of its digits is 432000, while the sum is 47.

The square root of 51986585 is about 7210.1723280377. The cubic root of 51986585 is about 373.2190157179.

The spelling of 51986585 in words is "fifty-one million, nine hundred eighty-six thousand, five hundred eighty-five".