64516223 has 4 divisors (see below), whose sum is σ = 65573928. Its totient is φ = 63458520.

The previous prime is 64516181. The next prime is 64516253. The reversal of 64516223 is 32261546.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64516223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64516253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 528761 + ... + 528882.

It is an arithmetic number, because the mean of its divisors is an integer number (16393482).

Almost surely, 2^64516223 is an apocalyptic number.

64516223 is a deficient number, since it is larger than the sum of its proper divisors (1057705).

64516223 is a wasteful number, since it uses less digits than its factorization.

64516223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1057704.

The product of its digits is 8640, while the sum is 29.

The square root of 64516223 is about 8032.1991384676. The cubic root of 64516223 is about 401.0725859113.

Adding to 64516223 its reverse (32261546), we get a palindrome (96777769).

The spelling of 64516223 in words is "sixty-four million, five hundred sixteen thousand, two hundred twenty-three".