2173217211 has 24 divisors (see below), whose sum is σ = 3534935040. Its totient is φ = 1274612400.

The previous prime is 2173217209. The next prime is 2173217251. The reversal of 2173217211 is 1127123712.

It is not a de Polignac number, because 2173217211 - 2¹ = 2173217209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2173217251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 350991 + ... + 357128.

It is an arithmetic number, because the mean of its divisors is an integer number (147288960).

Almost surely, 2^2173217211 is an apocalyptic number.

2173217211 is a deficient number, since it is larger than the sum of its proper divisors (1361717829).

2173217211 is a wasteful number, since it uses less digits than its factorization.

2173217211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 708167 (or 708164 counting only the distinct ones).

The product of its digits is 1176, while the sum is 27.

The square root of 2173217211 is about 46617.7778427930. Note that the first 3 decimals coincide. The cubic root of 2173217211 is about 1295.2920855941.

The spelling of 2173217211 in words is "two billion, one hundred seventy-three million, two hundred seventeen thousand, two hundred eleven".