2166288433 has 4 divisors (see below), whose sum is σ = 2166401268. Its totient is φ = 2166175600.

The previous prime is 2166288389. The next prime is 2166288479. The reversal of 2166288433 is 3348826612.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 419717169 + 1746571264 = 20487^2 + 41792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2166288433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2166288433.

It is not an unprimeable number, because it can be changed into a prime (2166288533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19618 + ... + 68683.

It is an arithmetic number, because the mean of its divisors is an integer number (541600317).

Almost surely, 2^2166288433 is an apocalyptic number.

It is an amenable number.

2166288433 is a deficient number, since it is larger than the sum of its proper divisors (112835).

2166288433 is an equidigital number, since it uses as much as digits as its factorization.

2166288433 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112834.

The product of its digits is 331776, while the sum is 43.

The square root of 2166288433 is about 46543.4037539155. The cubic root of 2166288433 is about 1293.9140447528.

The spelling of 2166288433 in words is "two billion, one hundred sixty-six million, two hundred eighty-eight thousand, four hundred thirty-three".