264817221 has 8 divisors (see below), whose sum is σ = 364479744. Its totient is φ = 170849760.

The previous prime is 264817219. The next prime is 264817229. The reversal of 264817221 is 122718462.

264817221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 264817221 - 2¹ = 264817219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264817229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1423656 + ... + 1423841.

It is an arithmetic number, because the mean of its divisors is an integer number (45559968).

Almost surely, 2^264817221 is an apocalyptic number.

It is an amenable number.

264817221 is a deficient number, since it is larger than the sum of its proper divisors (99662523).

264817221 is a wasteful number, since it uses less digits than its factorization.

264817221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2847531.

The product of its digits is 10752, while the sum is 33.

The square root of 264817221 is about 16273.2056153666. The cubic root of 264817221 is about 642.1681196145.

The spelling of 264817221 in words is "two hundred sixty-four million, eight hundred seventeen thousand, two hundred twenty-one".