2131100243 has 2 divisors, whose sum is σ = 2131100244. Its totient is φ = 2131100242.

The previous prime is 2131100203. The next prime is 2131100261. The reversal of 2131100243 is 3420011312.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2131100243 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (2131100203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065550121 + 1065550122.

It is an arithmetic number, because the mean of its divisors is an integer number (1065550122).

Almost surely, 2^2131100243 is an apocalyptic number.

2131100243 is a deficient number, since it is larger than the sum of its proper divisors (1).

2131100243 is an equidigital number, since it uses as much as digits as its factorization.

2131100243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 2131100243 is about 46163.8412938092. The cubic root of 2131100243 is about 1286.8698507803.

Adding to 2131100243 its reverse (3420011312), we get a palindrome (5551111555).

The spelling of 2131100243 in words is "two billion, one hundred thirty-one million, one hundred thousand, two hundred forty-three".