64216443 has 8 divisors (see below), whose sum is σ = 87237648. Its totient is φ = 42003104.

The previous prime is 64216433. The next prime is 64216457. The reversal of 64216443 is 34461246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64216443 - 2²² = 60022139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 64216443.

It is not an unprimeable number, because it can be changed into a prime (64216403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201780 + ... + 202097.

It is an arithmetic number, because the mean of its divisors is an integer number (10904706).

Almost surely, 2^64216443 is an apocalyptic number.

64216443 is a deficient number, since it is larger than the sum of its proper divisors (23021205).

64216443 is a wasteful number, since it uses less digits than its factorization.

64216443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 403933.

The product of its digits is 13824, while the sum is 30.

The square root of 64216443 is about 8013.5162694038. The cubic root of 64216443 is about 400.4504155409.

Adding to 64216443 its reverse (34461246), we get a palindrome (98677689).

The spelling of 64216443 in words is "sixty-four million, two hundred sixteen thousand, four hundred forty-three".