2166511216 has 10 divisors (see below), whose sum is σ = 4197615512. Its totient is φ = 1083255600.

The previous prime is 2166511189. The next prime is 2166511261. The reversal of 2166511216 is 6121156612.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 67703460 + ... + 67703491.

Almost surely, 2^2166511216 is an apocalyptic number.

It is an amenable number.

2166511216 is a deficient number, since it is larger than the sum of its proper divisors (2031104296).

2166511216 is a wasteful number, since it uses less digits than its factorization.

2166511216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135406959 (or 135406953 counting only the distinct ones).

The product of its digits is 4320, while the sum is 31.

The square root of 2166511216 is about 46545.7969745927. The cubic root of 2166511216 is about 1293.9583989836.

Adding to 2166511216 its reverse (6121156612), we get a palindrome (8287667828).

The spelling of 2166511216 in words is "two billion, one hundred sixty-six million, five hundred eleven thousand, two hundred sixteen".