51636065 has 16 divisors (see below), whose sum is σ = 67040400. Its totient is φ = 37953792.

The previous prime is 51636023. The next prime is 51636121. The reversal of 51636065 is 56063615.

It can be written as a sum of positive squares in 8 ways, for example, as 4946176 + 46689889 = 2224^2 + 6833^2 .

It is a cyclic number.

It is not a de Polignac number, because 51636065 - 2⁶ = 51636001 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13151 + ... + 16619.

It is an arithmetic number, because the mean of its divisors is an integer number (4190025).

Almost surely, 2^51636065 is an apocalyptic number.

It is an amenable number.

51636065 is a deficient number, since it is larger than the sum of its proper divisors (15404335).

51636065 is a wasteful number, since it uses less digits than its factorization.

51636065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3716.

The product of its (nonzero) digits is 16200, while the sum is 32.

The square root of 51636065 is about 7185.8238915242. The cubic root of 51636065 is about 372.3783125782.

The spelling of 51636065 in words is "fifty-one million, six hundred thirty-six thousand, sixty-five".