2256563 has 4 divisors (see below), whose sum is σ = 2389320. Its totient is φ = 2123808.

The previous prime is 2256559. The next prime is 2256571. The reversal of 2256563 is 3656522.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2256563 - 2² = 2256559 is a prime.

It is a d-powerful number, because it can be written as 2⁸ + 2¹⁰ + 5⁶ + 6² + 5⁹ + 6⁷ + 3⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256533) 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, 66353 + ... + 66386.

It is an arithmetic number, because the mean of its divisors is an integer number (597330).

2^2256563 is an apocalyptic number.

2256563 is a deficient number, since it is larger than the sum of its proper divisors (132757).

2256563 is a wasteful number, since it uses less digits than its factorization.

2256563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132756.

The product of its digits is 10800, while the sum is 29.

The square root of 2256563 is about 1502.1860736939. The cubic root of 2256563 is about 131.1643528911.

The spelling of 2256563 in words is "two million, two hundred fifty-six thousand, five hundred sixty-three".