515656065 has 16 divisors (see below), whose sum is σ = 825536448. Its totient is φ = 274854336.

The previous prime is 515656051. The next prime is 515656069. The reversal of 515656065 is 560656515.

It is not a de Polignac number, because 515656065 - 2¹⁶ = 515590529 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (515656069) 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, 18799 + ... + 37211.

It is an arithmetic number, because the mean of its divisors is an integer number (51596028).

Almost surely, 2^515656065 is an apocalyptic number.

It is an amenable number.

515656065 is a deficient number, since it is larger than the sum of its proper divisors (309880383).

515656065 is a wasteful number, since it uses less digits than its factorization.

515656065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20288.

The product of its (nonzero) digits is 135000, while the sum is 39.

The square root of 515656065 is about 22708.0616742161. The cubic root of 515656065 is about 801.8996859419.

It can be divided in two parts, 51565 and 6065, that added together give a triangular number (57630 = T₃₃₉).

The spelling of 515656065 in words is "five hundred fifteen million, six hundred fifty-six thousand, sixty-five".