264943221 has 8 divisors (see below), whose sum is σ = 357514080. Its totient is φ = 174500592.

The previous prime is 264943219. The next prime is 264943223. The reversal of 264943221 is 122349462.

It is an interprime number because it is at equal distance from previous prime (264943219) and next prime (264943223).

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

It is not a de Polignac number, because 264943221 - 2¹ = 264943219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (264943223) 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, 531766 + ... + 532263.

It is an arithmetic number, because the mean of its divisors is an integer number (44689260).

Almost surely, 2^264943221 is an apocalyptic number.

It is an amenable number.

264943221 is a deficient number, since it is larger than the sum of its proper divisors (92570859).

264943221 is a wasteful number, since it uses less digits than its factorization.

264943221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1064115.

The product of its digits is 20736, while the sum is 33.

The square root of 264943221 is about 16277.0765495527. The cubic root of 264943221 is about 642.2699513022.

The spelling of 264943221 in words is "two hundred sixty-four million, nine hundred forty-three thousand, two hundred twenty-one".