64516313 has 4 divisors (see below), whose sum is σ = 64538880. Its totient is φ = 64493748.

The previous prime is 64516303. The next prime is 64516327. The reversal of 64516313 is 31361546.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31361546 = 2 ⋅15680773.

It is a cyclic number.

It is not a de Polignac number, because 64516313 - 2⁸ = 64516057 is a prime.

It is a super-2 number, since 2×64516313² = 8324709286227938, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64516303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6245 + ... + 12962.

It is an arithmetic number, because the mean of its divisors is an integer number (16134720).

Almost surely, 2^64516313 is an apocalyptic number.

It is an amenable number.

64516313 is a deficient number, since it is larger than the sum of its proper divisors (22567).

64516313 is a wasteful number, since it uses less digits than its factorization.

64516313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22566.

The product of its digits is 6480, while the sum is 29.

The square root of 64516313 is about 8032.2047409164. The cubic root of 64516313 is about 401.0727724097.

Adding to 64516313 its reverse (31361546), we get a palindrome (95877859).

The spelling of 64516313 in words is "sixty-four million, five hundred sixteen thousand, three hundred thirteen".