256555203 has 24 divisors (see below), whose sum is σ = 353660400. Its totient is φ = 165381120.

The previous prime is 256555099. The next prime is 256555207. The reversal of 256555203 is 302555652.

It is not a de Polignac number, because 256555203 - 2⁹ = 256554691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256555207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1721773 + ... + 1721921.

It is an arithmetic number, because the mean of its divisors is an integer number (14735850).

Almost surely, 2^256555203 is an apocalyptic number.

256555203 is a deficient number, since it is larger than the sum of its proper divisors (97105197).

256555203 is an equidigital number, since it uses as much as digits as its factorization.

256555203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 407 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 33.

The square root of 256555203 is about 16017.3406968822. The cubic root of 256555203 is about 635.4191152984.

The spelling of 256555203 in words is "two hundred fifty-six million, five hundred fifty-five thousand, two hundred three".