2166511226 has 16 divisors (see below), whose sum is σ = 3627648288. Its totient is φ = 961875600.

The previous prime is 2166511189. The next prime is 2166511261. The reversal of 2166511226 is 6221156612.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2166511192 and 2166511201.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 1144145 + ... + 1146036.

It is an arithmetic number, because the mean of its divisors is an integer number (226728018).

Almost surely, 2^2166511226 is an apocalyptic number.

2166511226 is a deficient number, since it is larger than the sum of its proper divisors (1461137062).

2166511226 is a wasteful number, since it uses less digits than its factorization.

2166511226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2290237.

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

The square root of 2166511226 is about 46545.7970820138. The cubic root of 2166511226 is about 1293.9584009745.

Adding to 2166511226 its reverse (6221156612), we get a palindrome (8387667838).

The spelling of 2166511226 in words is "two billion, one hundred sixty-six million, five hundred eleven thousand, two hundred twenty-six".