2153111243 has 2 divisors, whose sum is σ = 2153111244. Its totient is φ = 2153111242.

The previous prime is 2153111209. The next prime is 2153111291. The reversal of 2153111243 is 3421113512.

2153111243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2153111243 - 2²⁶ = 2086002379 is a prime.

It is not a weakly prime, because it can be changed into another prime (2153110243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1076555621 + 1076555622.

It is an arithmetic number, because the mean of its divisors is an integer number (1076555622).

Almost surely, 2^2153111243 is an apocalyptic number.

2153111243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2153111243 is an equidigital number, since it uses as much as digits as its factorization.

2153111243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 720, while the sum is 23.

The square root of 2153111243 is about 46401.6297450855. The cubic root of 2153111243 is about 1291.2851489604.

Adding to 2153111243 its reverse (3421113512), we get a palindrome (5574224755).

The spelling of 2153111243 in words is "two billion, one hundred fifty-three million, one hundred eleven thousand, two hundred forty-three".