256576253 has 4 divisors (see below), whose sum is σ = 265423740. Its totient is φ = 247728768.

The previous prime is 256576213. The next prime is 256576277. The reversal of 256576253 is 352675652.

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 165431044 + 91145209 = 12862^2 + 9547^2 .

It is a cyclic number.

It is not a de Polignac number, because 256576253 - 2¹⁰ = 256575229 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256576253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (256576213) 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, 4423700 + ... + 4423757.

It is an arithmetic number, because the mean of its divisors is an integer number (66355935).

Almost surely, 2^256576253 is an apocalyptic number.

It is an amenable number.

256576253 is a deficient number, since it is larger than the sum of its proper divisors (8847487).

256576253 is an equidigital number, since it uses as much as digits as its factorization.

256576253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8847486.

The product of its digits is 378000, while the sum is 41.

The square root of 256576253 is about 16017.9977837431. The cubic root of 256576253 is about 635.4364932433.

The spelling of 256576253 in words is "two hundred fifty-six million, five hundred seventy-six thousand, two hundred fifty-three".