2166511215 has 16 divisors (see below), whose sum is σ = 3781547136. Its totient is φ = 1050429600.

The previous prime is 2166511189. The next prime is 2166511261. The reversal of 2166511215 is 5121156612.

It is not a de Polignac number, because 2166511215 - 2¹⁴ = 2166494831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6565021 + ... + 6565350.

It is an arithmetic number, because the mean of its divisors is an integer number (236346696).

Almost surely, 2^2166511215 is an apocalyptic number.

2166511215 is a deficient number, since it is larger than the sum of its proper divisors (1615035921).

2166511215 is a wasteful number, since it uses less digits than its factorization.

2166511215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13130390.

The product of its digits is 3600, while the sum is 30.

The square root of 2166511215 is about 46545.7969638506. The cubic root of 2166511215 is about 1293.9583987846.

Adding to 2166511215 its reverse (5121156612), we get a palindrome (7287667827).

The spelling of 2166511215 in words is "two billion, one hundred sixty-six million, five hundred eleven thousand, two hundred fifteen".