256565323 has 6 divisors (see below), whose sum is σ = 298453596. Its totient is φ = 219913092.

The previous prime is 256565317. The next prime is 256565347. The reversal of 256565323 is 323565652.

256565323 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-256565323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256565383) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2617965 + ... + 2618062.

It is an arithmetic number, because the mean of its divisors is an integer number (49742266).

Almost surely, 2^256565323 is an apocalyptic number.

256565323 is a deficient number, since it is larger than the sum of its proper divisors (41888273).

256565323 is an equidigital number, since it uses as much as digits as its factorization.

256565323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236041 (or 5236034 counting only the distinct ones).

The product of its digits is 162000, while the sum is 37.

The square root of 256565323 is about 16017.6566013884. The cubic root of 256565323 is about 635.4274700395.

The spelling of 256565323 in words is "two hundred fifty-six million, five hundred sixty-five thousand, three hundred twenty-three".