2565530223 has 16 divisors (see below), whose sum is σ = 3435465216. Its totient is φ = 1702990080.

The previous prime is 2565530213. The next prime is 2565530251. The reversal of 2565530223 is 3220355652.

It is not a de Polignac number, because 2565530223 - 2⁴ = 2565530207 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565530213) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 959178 + ... + 961848.

It is an arithmetic number, because the mean of its divisors is an integer number (214716576).

Almost surely, 2^2565530223 is an apocalyptic number.

2565530223 is a deficient number, since it is larger than the sum of its proper divisors (869934993).

2565530223 is a wasteful number, since it uses less digits than its factorization.

2565530223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3934.

The product of its (nonzero) digits is 54000, while the sum is 33.

The square root of 2565530223 is about 50651.0633945626. The cubic root of 2565530223 is about 1368.9651059860.

Adding to 2565530223 its reverse (3220355652), we get a palindrome (5785885875).

The spelling of 2565530223 in words is "two billion, five hundred sixty-five million, five hundred thirty thousand, two hundred twenty-three".