256664211 has 8 divisors (see below), whose sum is σ = 342309264. Its totient is φ = 171064320.

The previous prime is 256664209. The next prime is 256664237. The reversal of 256664211 is 112466652.

256664211 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 256664211 - 2¹ = 256664209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256664281) 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, 5571 + ... + 23331.

It is an arithmetic number, because the mean of its divisors is an integer number (42788658).

Almost surely, 2^256664211 is an apocalyptic number.

256664211 is a deficient number, since it is larger than the sum of its proper divisors (85645053).

256664211 is a wasteful number, since it uses less digits than its factorization.

256664211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22581.

The product of its digits is 17280, while the sum is 33.

The square root of 256664211 is about 16020.7431475572. The cubic root of 256664211 is about 635.5090971792.

The spelling of 256664211 in words is "two hundred fifty-six million, six hundred sixty-four thousand, two hundred eleven".