5243540123 has 2 divisors, whose sum is σ = 5243540124. Its totient is φ = 5243540122.

The previous prime is 5243540089. The next prime is 5243540153. The reversal of 5243540123 is 3210453425.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 5243540123 - 2¹⁰ = 5243539099 is a prime.

It is not a weakly prime, because it can be changed into another prime (5243540153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2621770061 + 2621770062.

It is an arithmetic number, because the mean of its divisors is an integer number (2621770062).

Almost surely, 2^5243540123 is an apocalyptic number.

5243540123 is a deficient number, since it is larger than the sum of its proper divisors (1).

5243540123 is an equidigital number, since it uses as much as digits as its factorization.

5243540123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 29.

The square root of 5243540123 is about 72412.2926235594. The cubic root of 5243540123 is about 1737.3001821038.

Adding to 5243540123 its reverse (3210453425), we get a palindrome (8453993548).

The spelling of 5243540123 in words is "five billion, two hundred forty-three million, five hundred forty thousand, one hundred twenty-three".