256056067 has 4 divisors (see below), whose sum is σ = 256305456. Its totient is φ = 255806680.

The previous prime is 256056061. The next prime is 256056107. The reversal of 256056067 is 760650652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-256056067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256056061) 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 3 ways as a sum of consecutive naturals, for example, 123148 + ... + 125209.

It is an arithmetic number, because the mean of its divisors is an integer number (64076364).

Almost surely, 2^256056067 is an apocalyptic number.

256056067 is a deficient number, since it is larger than the sum of its proper divisors (249389).

256056067 is a wasteful number, since it uses less digits than its factorization.

256056067 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249388.

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 256056067 is about 16001.7519978282. The cubic root of 256056067 is about 635.0067719947.

The spelling of 256056067 in words is "two hundred fifty-six million, fifty-six thousand, sixty-seven".