2165427611 has 4 divisors (see below), whose sum is σ = 2169584424. Its totient is φ = 2161270800.

The previous prime is 2165427599. The next prime is 2165427623. The reversal of 2165427611 is 1167245612.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2165427599) and next prime (2165427623).

It is a cyclic number.

It is not a de Polignac number, because 2165427611 - 2¹⁰ = 2165426587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165427911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2077625 + ... + 2078666.

It is an arithmetic number, because the mean of its divisors is an integer number (542396106).

Almost surely, 2^2165427611 is an apocalyptic number.

2165427611 is a deficient number, since it is larger than the sum of its proper divisors (4156813).

2165427611 is an equidigital number, since it uses as much as digits as its factorization.

2165427611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4156812.

The product of its digits is 20160, while the sum is 35.

The square root of 2165427611 is about 46534.1553162835. The cubic root of 2165427611 is about 1293.7426337154.

The spelling of 2165427611 in words is "two billion, one hundred sixty-five million, four hundred twenty-seven thousand, six hundred eleven".