2217278266 has 16 divisors (see below), whose sum is σ = 3801957120. Its totient is φ = 950034960.

The previous prime is 2217278257. The next prime is 2217278279. The reversal of 2217278266 is 6628727122.

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, 50511 + ... + 83581.

It is an arithmetic number, because the mean of its divisors is an integer number (237622320).

Almost surely, 2^2217278266 is an apocalyptic number.

2217278266 is a deficient number, since it is larger than the sum of its proper divisors (1584678854).

2217278266 is a wasteful number, since it uses less digits than its factorization.

2217278266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37869.

The product of its digits is 225792, while the sum is 43.

The square root of 2217278266 is about 47087.9843059777. The cubic root of 2217278266 is about 1303.9874151150.

The spelling of 2217278266 in words is "two billion, two hundred seventeen million, two hundred seventy-eight thousand, two hundred sixty-six".