256513235 has 32 divisors (see below), whose sum is σ = 345138624. Its totient is φ = 181440000.

The previous prime is 256513223. The next prime is 256513253. The reversal of 256513235 is 532315652.

256513235 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 256513235 - 2⁶ = 256513171 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338477 + ... + 339233.

It is an arithmetic number, because the mean of its divisors is an integer number (10785582).

Almost surely, 2^256513235 is an apocalyptic number.

256513235 is a deficient number, since it is larger than the sum of its proper divisors (88625389).

256513235 is a wasteful number, since it uses less digits than its factorization.

256513235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 935.

The product of its digits is 27000, while the sum is 32.

The square root of 256513235 is about 16016.0305631577. The cubic root of 256513235 is about 635.3844655449.

Adding to 256513235 its reverse (532315652), we get a palindrome (788828887).

The spelling of 256513235 in words is "two hundred fifty-six million, five hundred thirteen thousand, two hundred thirty-five".