64218223 has 4 divisors (see below), whose sum is σ = 64234368. Its totient is φ = 64202080.

The previous prime is 64218169. The next prime is 64218229. The reversal of 64218223 is 32281246.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 64218223 - 2¹⁷ = 64087151 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64218191 and 64218200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64218229) 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 3 ways as a sum of consecutive naturals, for example, 2583 + ... + 11623.

It is an arithmetic number, because the mean of its divisors is an integer number (16058592).

Almost surely, 2^64218223 is an apocalyptic number.

64218223 is a deficient number, since it is larger than the sum of its proper divisors (16145).

64218223 is an equidigital number, since it uses as much as digits as its factorization.

64218223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16144.

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

The square root of 64218223 is about 8013.6273309906. The cubic root of 64218223 is about 400.4541155027.

Adding to 64218223 its reverse (32281246), we get a palindrome (96499469).

The spelling of 64218223 in words is "sixty-four million, two hundred eighteen thousand, two hundred twenty-three".