2165143049 has 2 divisors, whose sum is σ = 2165143050. Its totient is φ = 2165143048.

The previous prime is 2165143039. The next prime is 2165143061. The reversal of 2165143049 is 9403415612.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1206311824 + 958831225 = 34732^2 + 30965^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165143049 - 2⁴ = 2165143033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2165143039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082571524 + 1082571525.

It is an arithmetic number, because the mean of its divisors is an integer number (1082571525).

Almost surely, 2^2165143049 is an apocalyptic number.

It is an amenable number.

2165143049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165143049 is an equidigital number, since it uses as much as digits as its factorization.

2165143049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 2165143049 is about 46531.0976552241. The cubic root of 2165143049 is about 1293.6859603641.

The spelling of 2165143049 in words is "two billion, one hundred sixty-five million, one hundred forty-three thousand, forty-nine".