2187159791 has 2 divisors, whose sum is σ = 2187159792. Its totient is φ = 2187159790.

The previous prime is 2187159763. The next prime is 2187159817. The reversal of 2187159791 is 1979517812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2187159791 - 2¹⁴ = 2187143407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2187159731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1093579895 + 1093579896.

It is an arithmetic number, because the mean of its divisors is an integer number (1093579896).

Almost surely, 2^2187159791 is an apocalyptic number.

2187159791 is a deficient number, since it is larger than the sum of its proper divisors (1).

2187159791 is an equidigital number, since it uses as much as digits as its factorization.

2187159791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 317520, while the sum is 50.

The square root of 2187159791 is about 46767.0802060595. The cubic root of 2187159791 is about 1298.0562254699.

The spelling of 2187159791 in words is "two billion, one hundred eighty-seven million, one hundred fifty-nine thousand, seven hundred ninety-one".