2216722185 has 12 divisors (see below), whose sum is σ = 3842318532. Its totient is φ = 1182251808.

The previous prime is 2216722163. The next prime is 2216722201. The reversal of 2216722185 is 5812276122.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 336979449 + 1879742736 = 18357^2 + 43356^2 .

It is not a de Polignac number, because 2216722185 - 2⁶ = 2216722121 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 24630202 + ... + 24630291.

It is an arithmetic number, because the mean of its divisors is an integer number (320193211).

Almost surely, 2^2216722185 is an apocalyptic number.

It is an amenable number.

2216722185 is a deficient number, since it is larger than the sum of its proper divisors (1625596347).

2216722185 is a wasteful number, since it uses less digits than its factorization.

2216722185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49260504 (or 49260501 counting only the distinct ones).

The product of its digits is 26880, while the sum is 36.

The square root of 2216722185 is about 47082.0792340355. The cubic root of 2216722185 is about 1303.8783950814.

The spelling of 2216722185 in words is "two billion, two hundred sixteen million, seven hundred twenty-two thousand, one hundred eighty-five".