64252513 has 4 divisors (see below), whose sum is σ = 69195028. Its totient is φ = 59310000.

The previous prime is 64252511. The next prime is 64252549. The reversal of 64252513 is 31525246.

64252513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31270464 + 32982049 = 5592^2 + 5743^2 .

It is a cyclic number.

It is not a de Polignac number, because 64252513 - 2¹ = 64252511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64252511) 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 3 ways as a sum of consecutive naturals, for example, 2471238 + ... + 2471263.

It is an arithmetic number, because the mean of its divisors is an integer number (17298757).

Almost surely, 2^64252513 is an apocalyptic number.

It is an amenable number.

64252513 is a deficient number, since it is larger than the sum of its proper divisors (4942515).

64252513 is a wasteful number, since it uses less digits than its factorization.

64252513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4942514.

The product of its digits is 7200, while the sum is 28.

The square root of 64252513 is about 8015.7665260410. The cubic root of 64252513 is about 400.5253783917.

Adding to 64252513 its reverse (31525246), we get a palindrome (95777759).

The spelling of 64252513 in words is "sixty-four million, two hundred fifty-two thousand, five hundred thirteen".