2215218166 has 16 divisors (see below), whose sum is σ = 3875018400. Its totient is φ = 949378920.

The previous prime is 2215218127. The next prime is 2215218179. The reversal of 2215218166 is 6618125122.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1613905 + ... + 1615276.

It is an arithmetic number, because the mean of its divisors is an integer number (242188650).

Almost surely, 2^2215218166 is an apocalyptic number.

2215218166 is a deficient number, since it is larger than the sum of its proper divisors (1659800234).

2215218166 is an equidigital number, since it uses as much as digits as its factorization.

2215218166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3229204 (or 3229190 counting only the distinct ones).

The product of its digits is 11520, while the sum is 34.

The square root of 2215218166 is about 47066.1042152418. The cubic root of 2215218166 is about 1303.5834398274.

The spelling of 2215218166 in words is "two billion, two hundred fifteen million, two hundred eighteen thousand, one hundred sixty-six".