256335613 has 4 divisors (see below), whose sum is σ = 261172188. Its totient is φ = 251499040.

The previous prime is 256335581. The next prime is 256335617. The reversal of 256335613 is 316533652.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 227798649 + 28536964 = 15093^2 + 5342^2 .

It is a cyclic number.

It is not a de Polignac number, because 256335613 - 2⁵ = 256335581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256335617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2418208 + ... + 2418313.

It is an arithmetic number, because the mean of its divisors is an integer number (65293047).

Almost surely, 2^256335613 is an apocalyptic number.

It is an amenable number.

256335613 is a deficient number, since it is larger than the sum of its proper divisors (4836575).

256335613 is an equidigital number, since it uses as much as digits as its factorization.

256335613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836574.

The product of its digits is 48600, while the sum is 34.

The square root of 256335613 is about 16010.4844711208. The cubic root of 256335613 is about 635.2377748435.

The spelling of 256335613 in words is "two hundred fifty-six million, three hundred thirty-five thousand, six hundred thirteen".