256323529 has 32 divisors (see below), whose sum is σ = 329204736. Its totient is φ = 193801920.

The previous prime is 256323517. The next prime is 256323563. The reversal of 256323529 is 925323652.

It is not a de Polignac number, because 256323529 - 2¹⁷ = 256192457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (256323629) 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 in 31 ways as a sum of consecutive naturals, for example, 436374 + ... + 436960.

It is an arithmetic number, because the mean of its divisors is an integer number (10287648).

Almost surely, 2^256323529 is an apocalyptic number.

It is an amenable number.

256323529 is a deficient number, since it is larger than the sum of its proper divisors (72881207).

256323529 is a wasteful number, since it uses less digits than its factorization.

256323529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765.

The product of its digits is 97200, while the sum is 37.

The square root of 256323529 is about 16010.1070889610. The cubic root of 256323529 is about 635.2277927035.

It can be divided in two parts, 25632 and 3529, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 256323529 in words is "two hundred fifty-six million, three hundred twenty-three thousand, five hundred twenty-nine".