256354223 has 2 divisors, whose sum is σ = 256354224. Its totient is φ = 256354222.

The previous prime is 256354211. The next prime is 256354291. The reversal of 256354223 is 322453652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256354223 - 2⁸ = 256353967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 256354223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256354123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128177111 + 128177112.

It is an arithmetic number, because the mean of its divisors is an integer number (128177112).

Almost surely, 2^256354223 is an apocalyptic number.

256354223 is a deficient number, since it is larger than the sum of its proper divisors (1).

256354223 is an equidigital number, since it uses as much as digits as its factorization.

256354223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 43200, while the sum is 32.

The square root of 256354223 is about 16011.0656422363. The cubic root of 256354223 is about 635.2531472541.

The spelling of 256354223 in words is "two hundred fifty-six million, three hundred fifty-four thousand, two hundred twenty-three".