256223923 has 2 divisors, whose sum is σ = 256223924. Its totient is φ = 256223922.

The previous prime is 256223909. The next prime is 256223951. The reversal of 256223923 is 329322652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256223923 - 2⁹ = 256223411 is a prime.

It is not a weakly prime, because it can be changed into another prime (256223953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128111961 + 128111962.

It is an arithmetic number, because the mean of its divisors is an integer number (128111962).

Almost surely, 2^256223923 is an apocalyptic number.

256223923 is a deficient number, since it is larger than the sum of its proper divisors (1).

256223923 is an equidigital number, since it uses as much as digits as its factorization.

256223923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 38880, while the sum is 34.

The square root of 256223923 is about 16006.9960642214. The cubic root of 256223923 is about 635.1454999629.

The spelling of 256223923 in words is "two hundred fifty-six million, two hundred twenty-three thousand, nine hundred twenty-three".