2165140049 has 2 divisors, whose sum is σ = 2165140050. Its totient is φ = 2165140048.

The previous prime is 2165139967. The next prime is 2165140067. The reversal of 2165140049 is 9400415612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2110483600 + 54656449 = 45940^2 + 7393^2 .

It is a cyclic number.

It is not a de Polignac number, because 2165140049 - 2²⁰ = 2164091473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2165139997 and 2165140024.

It is not a weakly prime, because it can be changed into another prime (2165140249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1082570024 + 1082570025.

It is an arithmetic number, because the mean of its divisors is an integer number (1082570025).

Almost surely, 2^2165140049 is an apocalyptic number.

It is an amenable number.

2165140049 is a deficient number, since it is larger than the sum of its proper divisors (1).

2165140049 is an equidigital number, since it uses as much as digits as its factorization.

2165140049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 2165140049 is about 46531.0654187071. The cubic root of 2165140049 is about 1293.6853628578.

The spelling of 2165140049 in words is "two billion, one hundred sixty-five million, one hundred forty thousand, forty-nine".