5243435521 has 4 divisors (see below), whose sum is σ = 5243610544. Its totient is φ = 5243260500.

The previous prime is 5243435513. The next prime is 5243435531. The reversal of 5243435521 is 1255343425.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5243435521 - 2³ = 5243435513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5243435531) 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, 29955 + ... + 106696.

It is an arithmetic number, because the mean of its divisors is an integer number (1310902636).

Almost surely, 2^5243435521 is an apocalyptic number.

It is an amenable number.

5243435521 is a deficient number, since it is larger than the sum of its proper divisors (175023).

5243435521 is a wasteful number, since it uses less digits than its factorization.

5243435521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175022.

The product of its digits is 72000, while the sum is 34.

The square root of 5243435521 is about 72411.5703530865. The cubic root of 5243435521 is about 1737.2886297124.

Adding to 5243435521 its reverse (1255343425), we get a palindrome (6498778946).

The spelling of 5243435521 in words is "five billion, two hundred forty-three million, four hundred thirty-five thousand, five hundred twenty-one".