2155234243 has 2 divisors, whose sum is σ = 2155234244. Its totient is φ = 2155234242.

The previous prime is 2155234229. The next prime is 2155234271. The reversal of 2155234243 is 3424325512.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2155234243 is a prime.

It is not a weakly prime, because it can be changed into another prime (2155234223) 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 as a sum of consecutive naturals, namely, 1077617121 + 1077617122.

It is an arithmetic number, because the mean of its divisors is an integer number (1077617122).

Almost surely, 2^2155234243 is an apocalyptic number.

2155234243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2155234243 is an equidigital number, since it uses as much as digits as its factorization.

2155234243 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 31.

The square root of 2155234243 is about 46424.5004604250. The cubic root of 2155234243 is about 1291.7094183912.

Adding to 2155234243 its reverse (3424325512), we get a palindrome (5579559755).

The spelling of 2155234243 in words is "two billion, one hundred fifty-five million, two hundred thirty-four thousand, two hundred forty-three".