264338221 has 4 divisors (see below), whose sum is σ = 302100832. Its totient is φ = 226575612.

The previous prime is 264338213. The next prime is 264338227. The reversal of 264338221 is 122833462.

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 not a de Polignac number, because 264338221 - 2³ = 264338213 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 (264338227) 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, 18881295 + ... + 18881308.

It is an arithmetic number, because the mean of its divisors is an integer number (75525208).

Almost surely, 2^264338221 is an apocalyptic number.

It is an amenable number.

264338221 is a deficient number, since it is larger than the sum of its proper divisors (37762611).

264338221 is an equidigital number, since it uses as much as digits as its factorization.

264338221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37762610.

The product of its digits is 13824, while the sum is 31.

The square root of 264338221 is about 16258.4815096613. The cubic root of 264338221 is about 641.7807024926.

The spelling of 264338221 in words is "two hundred sixty-four million, three hundred thirty-eight thousand, two hundred twenty-one".