2256523 has 4 divisors (see below), whose sum is σ = 2277720. Its totient is φ = 2235328.

The previous prime is 2256479. The next prime is 2256533. The reversal of 2256523 is 3256522.

2256523 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, and also an emirpimes, since its reverse is a distinct semiprime: 3256522 = 2 ⋅1628261.

It is a cyclic number.

It is not a de Polignac number, because 2256523 - 2¹³ = 2248331 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 2⁷ + 2¹¹ + 5⁷ + 6³ + 5⁷ + 2²¹ + 3⁶ .

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10438 + ... + 10651.

It is an arithmetic number, because the mean of its divisors is an integer number (569430).

2^2256523 is an apocalyptic number.

2256523 is a deficient number, since it is larger than the sum of its proper divisors (21197).

2256523 is a wasteful number, since it uses less digits than its factorization.

2256523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21196.

The product of its digits is 3600, while the sum is 25.

The square root of 2256523 is about 1502.1727597051. The cubic root of 2256523 is about 131.1635778769.

Subtracting 2256523 from its reverse (3256522), we obtain a palindrome (999999).

The spelling of 2256523 in words is "two million, two hundred fifty-six thousand, five hundred twenty-three".