256322623 has 2 divisors, whose sum is σ = 256322624. Its totient is φ = 256322622.

The previous prime is 256322621. The next prime is 256322641. The reversal of 256322623 is 326223652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256322623 - 2¹ = 256322621 is a prime.

Together with 256322621, 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 (256322621) 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, 128161311 + 128161312.

It is an arithmetic number, because the mean of its divisors is an integer number (128161312).

Almost surely, 2^256322623 is an apocalyptic number.

256322623 is a deficient number, since it is larger than the sum of its proper divisors (1).

256322623 is an equidigital number, since it uses as much as digits as its factorization.

256322623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 31.

The square root of 256322623 is about 16010.0787943095. The cubic root of 256322623 is about 635.2270442782.

The spelling of 256322623 in words is "two hundred fifty-six million, three hundred twenty-two thousand, six hundred twenty-three".