256944213 has 12 divisors (see below), whose sum is σ = 383114368. Its totient is φ = 165770280.

The previous prime is 256944199. The next prime is 256944229. The reversal of 256944213 is 312449652.

It is a happy number.

It is not a de Polignac number, because 256944213 - 2⁴ = 256944197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256944113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 460195 + ... + 460752.

Almost surely, 2^256944213 is an apocalyptic number.

It is an amenable number.

256944213 is a deficient number, since it is larger than the sum of its proper divisors (126170155).

256944213 is a wasteful number, since it uses less digits than its factorization.

256944213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920984 (or 920981 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 256944213 is about 16029.4794987236. The cubic root of 256944213 is about 635.7401112719.

The spelling of 256944213 in words is "two hundred fifty-six million, nine hundred forty-four thousand, two hundred thirteen".