256478211 has 32 divisors (see below), whose sum is σ = 420729600. Its totient is φ = 153109440.

The previous prime is 256478197. The next prime is 256478227. The reversal of 256478211 is 112874652.

256478211 is a `hidden beast` number, since 2 + 5 + 647 + 8 + 2 + 1 + 1 = 666.

It is not a de Polignac number, because 256478211 - 2⁵ = 256478179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256478011) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13455 + ... + 26343.

It is an arithmetic number, because the mean of its divisors is an integer number (13147800).

Almost surely, 2^256478211 is an apocalyptic number.

256478211 is a deficient number, since it is larger than the sum of its proper divisors (164251389).

256478211 is a wasteful number, since it uses less digits than its factorization.

256478211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12976 (or 12970 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 256478211 is about 16014.9371213252. The cubic root of 256478211 is about 635.3555460254.

The spelling of 256478211 in words is "two hundred fifty-six million, four hundred seventy-eight thousand, two hundred eleven".