256343203 has 4 divisors (see below), whose sum is σ = 256378608. Its totient is φ = 256307800.

The previous prime is 256343189. The next prime is 256343233. The reversal of 256343203 is 302343652.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 256343203 - 2²⁵ = 222788771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256343233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2476 + ... + 22777.

It is an arithmetic number, because the mean of its divisors is an integer number (64094652).

Almost surely, 2^256343203 is an apocalyptic number.

256343203 is a deficient number, since it is larger than the sum of its proper divisors (35405).

256343203 is a wasteful number, since it uses less digits than its factorization.

256343203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35404.

The product of its (nonzero) digits is 12960, while the sum is 28.

The square root of 256343203 is about 16010.7215015439. The cubic root of 256343203 is about 635.2440444979.

Adding to 256343203 its reverse (302343652), we get a palindrome (558686855).

The spelling of 256343203 in words is "two hundred fifty-six million, three hundred forty-three thousand, two hundred three".