64520315 has 8 divisors (see below), whose sum is σ = 78191568. Its totient is φ = 51104800.

The previous prime is 64520311. The next prime is 64520317. The reversal of 64520315 is 51302546.

64520315 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 64520315 - 2² = 64520311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64520311) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 63377 + ... + 64386.

It is an arithmetic number, because the mean of its divisors is an integer number (9773946).

Almost surely, 2^64520315 is an apocalyptic number.

64520315 is a deficient number, since it is larger than the sum of its proper divisors (13671253).

64520315 is a wasteful number, since it uses less digits than its factorization.

64520315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127869.

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 64520315 is about 8032.4538591890. The cubic root of 64520315 is about 401.0810651963.

The spelling of 64520315 in words is "sixty-four million, five hundred twenty thousand, three hundred fifteen".