264224221 has 4 divisors (see below), whose sum is σ = 264305052. Its totient is φ = 264143392.

The previous prime is 264224201. The next prime is 264224267. The reversal of 264224221 is 122422462.

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

It can be written as a sum of positive squares in 2 ways, for example, as 198387225 + 65836996 = 14085^2 + 8114^2 .

It is a cyclic number.

It is not a de Polignac number, because 264224221 - 2¹⁷ = 264093149 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 (264224201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35296 + ... + 42121.

It is an arithmetic number, because the mean of its divisors is an integer number (66076263).

Almost surely, 2^264224221 is an apocalyptic number.

It is an amenable number.

264224221 is a deficient number, since it is larger than the sum of its proper divisors (80831).

264224221 is an equidigital number, since it uses as much as digits as its factorization.

264224221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80830.

The product of its digits is 3072, while the sum is 25.

The square root of 264224221 is about 16254.9752691291. The cubic root of 264224221 is about 641.6884298985.

Adding to 264224221 its reverse (122422462), we get a palindrome (386646683).

The spelling of 264224221 in words is "two hundred sixty-four million, two hundred twenty-four thousand, two hundred twenty-one".