2161530143 has 2 divisors, whose sum is σ = 2161530144. Its totient is φ = 2161530142.

The previous prime is 2161530103. The next prime is 2161530169. The reversal of 2161530143 is 3410351612.

It is an a-pointer prime, because the next prime (2161530169) can be obtained adding 2161530143 to its sum of digits (26).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161530143 - 2¹⁰ = 2161529119 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161530103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1080765071 + 1080765072.

It is an arithmetic number, because the mean of its divisors is an integer number (1080765072).

Almost surely, 2^2161530143 is an apocalyptic number.

2161530143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161530143 is an equidigital number, since it uses as much as digits as its factorization.

2161530143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 2161530143 is about 46492.2589578093. The cubic root of 2161530143 is about 1292.9659820776.

Adding to 2161530143 its reverse (3410351612), we get a palindrome (5571881755).

The spelling of 2161530143 in words is "two billion, one hundred sixty-one million, five hundred thirty thousand, one hundred forty-three".