2165143 has 2 divisors, whose sum is σ = 2165144. Its totient is φ = 2165142.

The previous prime is 2165131. The next prime is 2165147. The reversal of 2165143 is 3415612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2165143 is a prime.

2165143 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2165147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082571 + 1082572.

It is an arithmetic number, because the mean of its divisors is an integer number (1082572).

2^2165143 is an apocalyptic number.

2165143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165143 is an equidigital number, since it uses as much as digits as its factorization.

2165143 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 22.

The square root of 2165143 is about 1471.4424895320. The cubic root of 2165143 is about 129.3685950605.

The spelling of 2165143 in words is "two million, one hundred sixty-five thousand, one hundred forty-three".