51564065 has 16 divisors (see below), whose sum is σ = 71031168. Its totient is φ = 35200896.

The previous prime is 51564041. The next prime is 51564083. The reversal of 51564065 is 56046515.

It is a cyclic number.

It is not a de Polignac number, because 51564065 - 2¹⁴ = 51547681 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 (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4994 + ... + 11316.

It is an arithmetic number, because the mean of its divisors is an integer number (4439448).

Almost surely, 2^51564065 is an apocalyptic number.

It is an amenable number.

51564065 is a deficient number, since it is larger than the sum of its proper divisors (19467103).

51564065 is a wasteful number, since it uses less digits than its factorization.

51564065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 51564065 is about 7180.8122799583. The cubic root of 51564065 is about 372.2051538257.

The spelling of 51564065 in words is "fifty-one million, five hundred sixty-four thousand, sixty-five".