2543533 has 4 divisors (see below), whose sum is σ = 2552508. Its totient is φ = 2534560.

The previous prime is 2543509. The next prime is 2543537. The reversal of 2543533 is 3353452.

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 2271049 + 272484 = 1507^2 + 522^2 .

It is a cyclic number.

It is not a de Polignac number, because 2543533 - 2¹⁷ = 2412461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2543498 and 2543507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543537) 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, 4048 + ... + 4633.

It is an arithmetic number, because the mean of its divisors is an integer number (638127).

2^2543533 is an apocalyptic number.

It is an amenable number.

2543533 is a deficient number, since it is larger than the sum of its proper divisors (8975).

2543533 is an equidigital number, since it uses as much as digits as its factorization.

2543533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8974.

The product of its digits is 5400, while the sum is 25.

The square root of 2543533 is about 1594.8457605675. The cubic root of 2543533 is about 136.5041302583.

Adding to 2543533 its reverse (3353452), we get a palindrome (5896985).

The spelling of 2543533 in words is "two million, five hundred forty-three thousand, five hundred thirty-three".