2166215464 has 32 divisors (see below), whose sum is σ = 4663915200. Its totient is φ = 923973120.

The previous prime is 2166215461. The next prime is 2166215473. The reversal of 2166215464 is 4645126612.

It is not an unprimeable number, because it can be changed into a prime (2166215461) 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 7 ways as a sum of consecutive naturals, for example, 79849 + ... + 103480.

It is an arithmetic number, because the mean of its divisors is an integer number (145747350).

Almost surely, 2^2166215464 is an apocalyptic number.

It is an amenable number.

2166215464 is an abundant number, since it is smaller than the sum of its proper divisors (2497699736).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2166215464 is a wasteful number, since it uses less digits than its factorization.

2166215464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183553 (or 183549 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 2166215464 is about 46542.6198660969. The cubic root of 2166215464 is about 1293.8995165745.

The spelling of 2166215464 in words is "two billion, one hundred sixty-six million, two hundred fifteen thousand, four hundred sixty-four".