64248321 has 16 divisors (see below), whose sum is σ = 92816064. Its totient is φ = 39373824.

The previous prime is 64248313. The next prime is 64248323. The reversal of 64248321 is 12384246.

It is not a de Polignac number, because 64248321 - 2³ = 64248313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64248323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12456 + ... + 16841.

It is an arithmetic number, because the mean of its divisors is an integer number (5801004).

Almost surely, 2^64248321 is an apocalyptic number.

It is an amenable number.

64248321 is a deficient number, since it is larger than the sum of its proper divisors (28567743).

64248321 is a wasteful number, since it uses less digits than its factorization.

64248321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29360.

The product of its digits is 9216, while the sum is 30.

The square root of 64248321 is about 8015.5050371140. The cubic root of 64248321 is about 400.5166677654.

The spelling of 64248321 in words is "sixty-four million, two hundred forty-eight thousand, three hundred twenty-one".