5243540121 has 12 divisors (see below), whose sum is σ = 7574644272. Its totient is φ = 3495397176.

The previous prime is 5243540089. The next prime is 5243540123. The reversal of 5243540121 is 1210453425.

It is not a de Polignac number, because 5243540121 - 2⁵ = 5243540089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (5243540123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 160630 + ... + 190496.

It is an arithmetic number, because the mean of its divisors is an integer number (631220356).

Almost surely, 2^5243540121 is an apocalyptic number.

It is an amenable number.

5243540121 is a deficient number, since it is larger than the sum of its proper divisors (2331104151).

5243540121 is a wasteful number, since it uses less digits than its factorization.

5243540121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49380 (or 49377 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 5243540121 is about 72412.2926097496. The cubic root of 5243540121 is about 1737.3001818829.

Adding to 5243540121 its reverse (1210453425), we get a palindrome (6453993546).

The spelling of 5243540121 in words is "five billion, two hundred forty-three million, five hundred forty thousand, one hundred twenty-one".