256563203 has 8 divisors (see below), whose sum is σ = 285826800. Its totient is φ = 228660768.

The previous prime is 256563193. The next prime is 256563221. The reversal of 256563203 is 302365652.

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

It is a cyclic number.

It is not a de Polignac number, because 256563203 - 2¹⁰ = 256562179 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256563203.

It is not an unprimeable number, because it can be changed into a prime (256563253) 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 7 ways as a sum of consecutive naturals, for example, 339893 + ... + 340646.

It is an arithmetic number, because the mean of its divisors is an integer number (35728350).

Almost surely, 2^256563203 is an apocalyptic number.

256563203 is a deficient number, since it is larger than the sum of its proper divisors (29263597).

256563203 is a wasteful number, since it uses less digits than its factorization.

256563203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 680581.

The product of its (nonzero) digits is 32400, while the sum is 32.

The square root of 256563203 is about 16017.5904242804. The cubic root of 256563203 is about 635.4257198550.

The spelling of 256563203 in words is "two hundred fifty-six million, five hundred sixty-three thousand, two hundred three".