2256743065 has 4 divisors (see below), whose sum is σ = 2708091684. Its totient is φ = 1805394448.

The previous prime is 2256743063. The next prime is 2256743077. The reversal of 2256743065 is 5603476522.

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 930982144 + 1325760921 = 30512^2 + 36411^2 .

It is a cyclic number.

It is not a de Polignac number, because 2256743065 - 2¹ = 2256743063 is a prime.

It is a super-2 number, since 2×2256743065² = 10185778522851188450, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256743063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225674302 + ... + 225674311.

It is an arithmetic number, because the mean of its divisors is an integer number (677022921).

Almost surely, 2^2256743065 is an apocalyptic number.

It is an amenable number.

2256743065 is a deficient number, since it is larger than the sum of its proper divisors (451348619).

2256743065 is an equidigital number, since it uses as much as digits as its factorization.

2256743065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451348618.

The product of its (nonzero) digits is 302400, while the sum is 40.

The square root of 2256743065 is about 47505.1898743706. The cubic root of 2256743065 is about 1311.6784160104.

The spelling of 2256743065 in words is "two billion, two hundred fifty-six million, seven hundred forty-three thousand, sixty-five".