2218642897 has 2 divisors, whose sum is σ = 2218642898. Its totient is φ = 2218642896.

The previous prime is 2218642847. The next prime is 2218642927. The reversal of 2218642897 is 7982468122.

2218642897 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1577996176 + 640646721 = 39724^2 + 25311^2 .

It is a cyclic number.

It is not a de Polignac number, because 2218642897 - 2²⁷ = 2084425169 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2218642897.

It is not a weakly prime, because it can be changed into another prime (2218642847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1109321448 + 1109321449.

It is an arithmetic number, because the mean of its divisors is an integer number (1109321449).

Almost surely, 2^2218642897 is an apocalyptic number.

It is an amenable number.

2218642897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2218642897 is an equidigital number, since it uses as much as digits as its factorization.

2218642897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 774144, while the sum is 49.

The square root of 2218642897 is about 47102.4723024174. The cubic root of 2218642897 is about 1304.2548746612.

The spelling of 2218642897 in words is "two billion, two hundred eighteen million, six hundred forty-two thousand, eight hundred ninety-seven".