64443223 has 16 divisors (see below), whose sum is σ = 70963200. Its totient is φ = 58163040.

The previous prime is 64443187. The next prime is 64443227. The reversal of 64443223 is 32234446.

It is a de Polignac number, because none of the positive numbers 2^k-64443223 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64443191 and 64443200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64443227) 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 15 ways as a sum of consecutive naturals, for example, 134298 + ... + 134776.

It is an arithmetic number, because the mean of its divisors is an integer number (4435200).

Almost surely, 2^64443223 is an apocalyptic number.

64443223 is a deficient number, since it is larger than the sum of its proper divisors (6519977).

64443223 is a wasteful number, since it uses less digits than its factorization.

64443223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 702.

The product of its digits is 13824, while the sum is 28.

The square root of 64443223 is about 8027.6536422544. The cubic root of 64443223 is about 400.9212578311.

Adding to 64443223 its reverse (32234446), we get a palindrome (96677669).

The spelling of 64443223 in words is "sixty-four million, four hundred forty-three thousand, two hundred twenty-three".