2218166371 has 2 divisors, whose sum is σ = 2218166372. Its totient is φ = 2218166370.

The previous prime is 2218166369. The next prime is 2218166399. The reversal of 2218166371 is 1736618122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2218166371 - 2¹ = 2218166369 is a prime.

Together with 2218166369, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2218166371.

It is not a weakly prime, because it can be changed into another prime (2218166351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109083185 + 1109083186.

It is an arithmetic number, because the mean of its divisors is an integer number (1109083186).

Almost surely, 2^2218166371 is an apocalyptic number.

2218166371 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218166371 is an equidigital number, since it uses as much as digits as its factorization.

2218166371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24192, while the sum is 37.

The square root of 2218166371 is about 47097.4136338717. The cubic root of 2218166371 is about 1304.1614908692.

The spelling of 2218166371 in words is "two billion, two hundred eighteen million, one hundred sixty-six thousand, three hundred seventy-one".