256513326 has 16 divisors (see below), whose sum is σ = 519208704. Its totient is φ = 84474104.

The previous prime is 256513291. The next prime is 256513331. The reversal of 256513326 is 623315652.

256513326 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 257046 + ... + 258041.

It is an arithmetic number, because the mean of its divisors is an integer number (32450544).

Almost surely, 2^256513326 is an apocalyptic number.

256513326 is an abundant number, since it is smaller than the sum of its proper divisors (262695378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256513326 is a wasteful number, since it uses less digits than its factorization.

256513326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515175.

The product of its digits is 32400, while the sum is 33.

The square root of 256513326 is about 16016.0334040611. The cubic root of 256513326 is about 635.3845406806.

Adding to 256513326 its reverse (623315652), we get a palindrome (879828978).

The spelling of 256513326 in words is "two hundred fifty-six million, five hundred thirteen thousand, three hundred twenty-six".