64240513 has 2 divisors, whose sum is σ = 64240514. Its totient is φ = 64240512.

The previous prime is 64240499. The next prime is 64240529. The reversal of 64240513 is 31504246.

64240513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63872064 + 368449 = 7992^2 + 607^2 .

It is a cyclic number.

It is not a de Polignac number, because 64240513 - 2¹³ = 64232321 is a prime.

It is a super-3 number, since 3×64240513³ (a number of 24 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (64240573) 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 as a sum of consecutive naturals, namely, 32120256 + 32120257.

It is an arithmetic number, because the mean of its divisors is an integer number (32120257).

Almost surely, 2^64240513 is an apocalyptic number.

It is an amenable number.

64240513 is a deficient number, since it is larger than the sum of its proper divisors (1).

64240513 is an equidigital number, since it uses as much as digits as its factorization.

64240513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 64240513 is about 8015.0179662930. The cubic root of 64240513 is about 400.5004423824.

Adding to 64240513 its reverse (31504246), we get a palindrome (95744759).

The spelling of 64240513 in words is "sixty-four million, two hundred forty thousand, five hundred thirteen".