2565533 has 4 divisors (see below), whose sum is σ = 2589180. Its totient is φ = 2541888.

The previous prime is 2565463. The next prime is 2565559. The reversal of 2565533 is 3355652.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1315609 + 1249924 = 1147^2 + 1118^2 .

It is a cyclic number.

It is not a de Polignac number, because 2565533 - 2¹⁶ = 2499997 is a prime.

It is a d-powerful number, because it can be written as 2¹⁹ + 5 + 6⁵ + 5⁷ + 5⁹ + 3³ + 3⁷ .

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2565496 and 2565505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2565593) 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, 11660 + ... + 11877.

It is an arithmetic number, because the mean of its divisors is an integer number (647295).

2^2565533 is an apocalyptic number.

It is an amenable number.

2565533 is a deficient number, since it is larger than the sum of its proper divisors (23647).

2565533 is a wasteful number, since it uses less digits than its factorization.

2565533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23646.

The product of its digits is 13500, while the sum is 29.

The square root of 2565533 is about 1601.7281292404. The cubic root of 2565533 is about 136.8965599921.

The spelling of 2565533 in words is "two million, five hundred sixty-five thousand, five hundred thirty-three".