64233105221 has 4 divisors (see below), whose sum is σ = 65191808352. Its totient is φ = 63274402092.

The previous prime is 64233105163. The next prime is 64233105257. The reversal of 64233105221 is 12250133246.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64233105221 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 (64233105121) 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, 479351465 + ... + 479351598.

It is an arithmetic number, because the mean of its divisors is an integer number (16297952088).

Almost surely, 2^64233105221 is an apocalyptic number.

It is an amenable number.

64233105221 is a deficient number, since it is larger than the sum of its proper divisors (958703131).

64233105221 is an equidigital number, since it uses as much as digits as its factorization.

64233105221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 958703130.

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

Adding to 64233105221 its reverse (12250133246), we get a palindrome (76483238467).

The spelling of 64233105221 in words is "sixty-four billion, two hundred thirty-three million, one hundred five thousand, two hundred twenty-one".