2165254163 has 4 divisors (see below), whose sum is σ = 2166067488. Its totient is φ = 2164440840.

The previous prime is 2165254151. The next prime is 2165254177. The reversal of 2165254163 is 3614525612.

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

It is a cyclic number.

It is not a de Polignac number, because 2165254163 - 2¹⁸ = 2164992019 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2165254363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402656 + ... + 407997.

It is an arithmetic number, because the mean of its divisors is an integer number (541516872).

Almost surely, 2^2165254163 is an apocalyptic number.

2165254163 is a deficient number, since it is larger than the sum of its proper divisors (813325).

2165254163 is an equidigital number, since it uses as much as digits as its factorization.

2165254163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 813324.

The product of its digits is 43200, while the sum is 35.

The square root of 2165254163 is about 46532.2916156082. The cubic root of 2165254163 is about 1293.7080904127.

Adding to 2165254163 its reverse (3614525612), we get a palindrome (5779779775).

The spelling of 2165254163 in words is "two billion, one hundred sixty-five million, two hundred fifty-four thousand, one hundred sixty-three".