256263065 has 4 divisors (see below), whose sum is σ = 307515684. Its totient is φ = 205010448.

The previous prime is 256263061. The next prime is 256263071. The reversal of 256263065 is 560362652.

256263065 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 188018944 + 68244121 = 13712^2 + 8261^2 .

It is a cyclic number.

It is not a de Polignac number, because 256263065 - 2² = 256263061 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (256263061) 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, 25626302 + ... + 25626311.

It is an arithmetic number, because the mean of its divisors is an integer number (76878921).

Almost surely, 2^256263065 is an apocalyptic number.

It is an amenable number.

256263065 is a deficient number, since it is larger than the sum of its proper divisors (51252619).

256263065 is an equidigital number, since it uses as much as digits as its factorization.

256263065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51252618.

The product of its (nonzero) digits is 64800, while the sum is 35.

The square root of 256263065 is about 16008.2186704205. The cubic root of 256263065 is about 635.1778409442.

The spelling of 256263065 in words is "two hundred fifty-six million, two hundred sixty-three thousand, sixty-five".