64651223 has 16 divisors (see below), whose sum is σ = 79759680. Its totient is φ = 51031296.

The previous prime is 64651207. The next prime is 64651241. The reversal of 64651223 is 32215646.

It is a cyclic number.

It is not a de Polignac number, because 64651223 - 2⁴ = 64651207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64651253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75011 + ... + 75867.

It is an arithmetic number, because the mean of its divisors is an integer number (4984980).

Almost surely, 2^64651223 is an apocalyptic number.

64651223 is a deficient number, since it is larger than the sum of its proper divisors (15108457).

64651223 is a wasteful number, since it uses less digits than its factorization.

64651223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1706.

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

The square root of 64651223 is about 8040.5984230031. The cubic root of 64651223 is about 401.3521387353.

Adding to 64651223 its reverse (32215646), we get a palindrome (96866869).

The spelling of 64651223 in words is "sixty-four million, six hundred fifty-one thousand, two hundred twenty-three".