515172065 has 8 divisors (see below), whose sum is σ = 618452520. Its totient is φ = 411973632.

The previous prime is 515172019. The next prime is 515172067. The reversal of 515172065 is 560271515.

It can be written as a sum of positive squares in 4 ways, for example, as 5180176 + 509991889 = 2276^2 + 22583^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 515172065 - 2⁶ = 515172001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (515172067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5714 + ... + 32603.

It is an arithmetic number, because the mean of its divisors is an integer number (77306565).

Almost surely, 2^515172065 is an apocalyptic number.

It is an amenable number.

515172065 is a deficient number, since it is larger than the sum of its proper divisors (103280455).

515172065 is a wasteful number, since it uses less digits than its factorization.

515172065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41011.

The product of its (nonzero) digits is 10500, while the sum is 32.

The square root of 515172065 is about 22697.4021641244. The cubic root of 515172065 is about 801.6487170185.

The spelling of 515172065 in words is "five hundred fifteen million, one hundred seventy-two thousand, sixty-five".