2565163 has 4 divisors (see below), whose sum is σ = 2578648. Its totient is φ = 2551680.

The previous prime is 2565161. The next prime is 2565191. The reversal of 2565163 is 3615652.

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 2565163 - 2¹ = 2565161 is a prime.

It is a super-3 number, since 3×2565163³ = 50636788711433357241, which contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2565161) 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, 6453 + ... + 6838.

It is an arithmetic number, because the mean of its divisors is an integer number (644662).

2^2565163 is an apocalyptic number.

2565163 is a deficient number, since it is larger than the sum of its proper divisors (13485).

2565163 is a wasteful number, since it uses less digits than its factorization.

2565163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13484.

The product of its digits is 5400, while the sum is 28.

The square root of 2565163 is about 1601.6126248254. The cubic root of 2565163 is about 136.8899786225.

The spelling of 2565163 in words is "two million, five hundred sixty-five thousand, one hundred sixty-three".