64282321 has 4 divisors (see below), whose sum is σ = 68063652. Its totient is φ = 60500992.

The previous prime is 64282307. The next prime is 64282327. The reversal of 64282321 is 12328246.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18584721 + 45697600 = 4311^2 + 6760^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64282321 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64282321.

It is not an unprimeable number, because it can be changed into a prime (64282327) 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, 1890640 + ... + 1890673.

It is an arithmetic number, because the mean of its divisors is an integer number (17015913).

Almost surely, 2^64282321 is an apocalyptic number.

It is an amenable number.

64282321 is a deficient number, since it is larger than the sum of its proper divisors (3781331).

64282321 is a wasteful number, since it uses less digits than its factorization.

64282321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3781330.

The product of its digits is 4608, while the sum is 28.

The square root of 64282321 is about 8017.6256460376. The cubic root of 64282321 is about 400.5873060071.

The spelling of 64282321 in words is "sixty-four million, two hundred eighty-two thousand, three hundred twenty-one".