64353521 has 4 divisors (see below), whose sum is σ = 64447344. Its totient is φ = 64259700.

The previous prime is 64353503. The next prime is 64353529. The reversal of 64353521 is 12535346.

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.

It is a cyclic number.

It is not a de Polignac number, because 64353521 - 2¹⁴ = 64337137 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64353529) 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 3 ways as a sum of consecutive naturals, for example, 45875 + ... + 47256.

It is an arithmetic number, because the mean of its divisors is an integer number (16111836).

Almost surely, 2^64353521 is an apocalyptic number.

It is an amenable number.

64353521 is a deficient number, since it is larger than the sum of its proper divisors (93823).

64353521 is an equidigital number, since it uses as much as digits as its factorization.

64353521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93822.

The product of its digits is 10800, while the sum is 29.

The square root of 64353521 is about 8022.0646344940. The cubic root of 64353521 is about 400.7351501413.

Adding to 64353521 its reverse (12535346), we get a palindrome (76888867).

The spelling of 64353521 in words is "sixty-four million, three hundred fifty-three thousand, five hundred twenty-one".