2133565 has 16 divisors (see below), whose sum is σ = 2990592. Its totient is φ = 1430784.

The previous prime is 2133563. The next prime is 2133587. The reversal of 2133565 is 5653312.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2133565 - 2¹ = 2133563 is a prime.

It is a d-powerful number, because it can be written as 2⁷ + 1 + 3 + 3¹¹ + 5⁵ + 6² + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133563) 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, 997 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (186912).

2^2133565 is an apocalyptic number.

It is an amenable number.

2133565 is a deficient number, since it is larger than the sum of its proper divisors (857027).

2133565 is a wasteful number, since it uses less digits than its factorization.

2133565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1356.

The product of its digits is 2700, while the sum is 25.

The square root of 2133565 is about 1460.6727901895. The cubic root of 2133565 is about 128.7365776060.

Adding to 2133565 its reverse (5653312), we get a palindrome (7786877).

The spelling of 2133565 in words is "two million, one hundred thirty-three thousand, five hundred sixty-five".