5243541565 has 4 divisors (see below), whose sum is σ = 6292249884. Its totient is φ = 4194833248.

The previous prime is 5243541559. The next prime is 5243541631. The reversal of 5243541565 is 5651453425.

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 895326084 + 4348215481 = 29922^2 + 65941^2 .

It is a cyclic number.

It is not a de Polignac number, because 5243541565 - 2⁷ = 5243541437 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 524354152 + ... + 524354161.

It is an arithmetic number, because the mean of its divisors is an integer number (1573062471).

Almost surely, 2^5243541565 is an apocalyptic number.

It is an amenable number.

5243541565 is a deficient number, since it is larger than the sum of its proper divisors (1048708319).

5243541565 is a wasteful number, since it uses less digits than its factorization.

5243541565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1048708318.

The product of its digits is 360000, while the sum is 40.

The square root of 5243541565 is about 72412.3025804317. The cubic root of 5243541565 is about 1737.3003413592.

The spelling of 5243541565 in words is "five billion, two hundred forty-three million, five hundred forty-one thousand, five hundred sixty-five".