64282821 has 16 divisors (see below), whose sum is σ = 89199360. Its totient is φ = 41128640.

The previous prime is 64282817. The next prime is 64282843. The reversal of 64282821 is 12828246.

It is a happy number.

64282821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64282821 - 2² = 64282817 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64282891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12916 + ... + 17186.

It is an arithmetic number, because the mean of its divisors is an integer number (5574960).

Almost surely, 2^64282821 is an apocalyptic number.

It is an amenable number.

64282821 is a deficient number, since it is larger than the sum of its proper divisors (24916539).

64282821 is a wasteful number, since it uses less digits than its factorization.

64282821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4476.

The product of its digits is 12288, while the sum is 33.

The square root of 64282821 is about 8017.6568272782. The cubic root of 64282821 is about 400.5883446189.

The spelling of 64282821 in words is "sixty-four million, two hundred eighty-two thousand, eight hundred twenty-one".