256323530 has 8 divisors (see below), whose sum is σ = 461382372. Its totient is φ = 102529408.

The previous prime is 256323517. The next prime is 256323563. The reversal of 256323530 is 35323652.

It can be written as a sum of positive squares in 2 ways, for example, as 254753521 + 1570009 = 15961^2 + 1253^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 256323493 and 256323502.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 12816167 + ... + 12816186.

Almost surely, 2^256323530 is an apocalyptic number.

256323530 is a deficient number, since it is larger than the sum of its proper divisors (205058842).

256323530 is a wasteful number, since it uses less digits than its factorization.

256323530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25632360.

The product of its (nonzero) digits is 16200, while the sum is 29.

The square root of 256323530 is about 16010.1071201913. The cubic root of 256323530 is about 635.2277935296.

The spelling of 256323530 in words is "two hundred fifty-six million, three hundred twenty-three thousand, five hundred thirty".