256203223 has 2 divisors, whose sum is σ = 256203224. Its totient is φ = 256203222.

The previous prime is 256203221. The next prime is 256203229. The reversal of 256203223 is 322302652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256203223 - 2¹ = 256203221 is a prime.

Together with 256203221, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256203221) 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 as a sum of consecutive naturals, namely, 128101611 + 128101612.

It is an arithmetic number, because the mean of its divisors is an integer number (128101612).

Almost surely, 2^256203223 is an apocalyptic number.

256203223 is a deficient number, since it is larger than the sum of its proper divisors (1).

256203223 is an equidigital number, since it uses as much as digits as its factorization.

256203223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 256203223 is about 16006.3494588866. The cubic root of 256203223 is about 635.1283953072.

Adding to 256203223 its reverse (322302652), we get a palindrome (578505875).

The spelling of 256203223 in words is "two hundred fifty-six million, two hundred three thousand, two hundred twenty-three".