64611223 has 4 divisors (see below), whose sum is σ = 66695488. Its totient is φ = 62526960.

The previous prime is 64611199. The next prime is 64611227. The reversal of 64611223 is 32211646.

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

It is a cyclic number.

It is not a de Polignac number, because 64611223 - 2²¹ = 62514071 is a prime.

It is a super-2 number, since 2×64611223² = 8349220275111458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64611227) 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, 1042086 + ... + 1042147.

It is an arithmetic number, because the mean of its divisors is an integer number (16673872).

Almost surely, 2^64611223 is an apocalyptic number.

64611223 is a deficient number, since it is larger than the sum of its proper divisors (2084265).

64611223 is a wasteful number, since it uses less digits than its factorization.

64611223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2084264.

The product of its digits is 1728, while the sum is 25.

The square root of 64611223 is about 8038.1106610944. The cubic root of 64611223 is about 401.2693488727.

Adding to 64611223 its reverse (32211646), we get a palindrome (96822869).

The spelling of 64611223 in words is "sixty-four million, six hundred eleven thousand, two hundred twenty-three".