256600313 has 4 divisors (see below), whose sum is σ = 256901988. Its totient is φ = 256298640.

The previous prime is 256600303. The next prime is 256600327. The reversal of 256600313 is 313006652.

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 60264169 + 196336144 = 7763^2 + 14012^2 .

It is a cyclic number.

It is not a de Polignac number, because 256600313 - 2¹² = 256596217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (256600303) 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 3 ways as a sum of consecutive naturals, for example, 149558 + ... + 151263.

It is an arithmetic number, because the mean of its divisors is an integer number (64225497).

Almost surely, 2^256600313 is an apocalyptic number.

It is an amenable number.

256600313 is a deficient number, since it is larger than the sum of its proper divisors (301675).

256600313 is an equidigital number, since it uses as much as digits as its factorization.

256600313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301674.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 256600313 is about 16018.7487963324. The cubic root of 256600313 is about 635.4563549466.

Adding to 256600313 its reverse (313006652), we get a palindrome (569606965).

The spelling of 256600313 in words is "two hundred fifty-six million, six hundred thousand, three hundred thirteen".