51164585 has 4 divisors (see below), whose sum is σ = 61397508. Its totient is φ = 40931664.

The previous prime is 51164569. The next prime is 51164629. The reversal of 51164585 is 58546115.

It is a happy number.

51164585 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, and also an emirpimes, since its reverse is a distinct semiprime: 58546115 = 5 ⋅11709223.

It can be written as a sum of positive squares in 2 ways, for example, as 31058329 + 20106256 = 5573^2 + 4484^2 .

It is a cyclic number.

It is not a de Polignac number, because 51164585 - 2⁴ = 51164569 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 5116454 + ... + 5116463.

It is an arithmetic number, because the mean of its divisors is an integer number (15349377).

Almost surely, 2^51164585 is an apocalyptic number.

It is an amenable number.

51164585 is a deficient number, since it is larger than the sum of its proper divisors (10232923).

51164585 is a wasteful number, since it uses less digits than its factorization.

51164585 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10232922.

The product of its digits is 24000, while the sum is 35.

The square root of 51164585 is about 7152.9424015576. The cubic root of 51164585 is about 371.2414713848.

The spelling of 51164585 in words is "fifty-one million, one hundred sixty-four thousand, five hundred eighty-five".