64315321 has 4 divisors (see below), whose sum is σ = 73503232. Its totient is φ = 55127412.

The previous prime is 64315313. The next prime is 64315327. The reversal of 64315321 is 12351346.

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 64315321 - 2³ = 64315313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64315327) 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, 4593945 + ... + 4593958.

It is an arithmetic number, because the mean of its divisors is an integer number (18375808).

Almost surely, 2^64315321 is an apocalyptic number.

It is an amenable number.

64315321 is a deficient number, since it is larger than the sum of its proper divisors (9187911).

64315321 is an equidigital number, since it uses as much as digits as its factorization.

64315321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9187910.

The product of its digits is 2160, while the sum is 25.

The square root of 64315321 is about 8019.6833478636. The cubic root of 64315321 is about 400.6558428377.

Adding to 64315321 its reverse (12351346), we get a palindrome (76666667).

The spelling of 64315321 in words is "sixty-four million, three hundred fifteen thousand, three hundred twenty-one".