2205817897 has 2 divisors, whose sum is σ = 2205817898. Its totient is φ = 2205817896.

The previous prime is 2205817853. The next prime is 2205817907. The reversal of 2205817897 is 7987185022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2201861776 + 3956121 = 46924^2 + 1989^2 .

It is a cyclic number.

It is not a de Polignac number, because 2205817897 - 2⁷ = 2205817769 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2205817897.

It is not a weakly prime, because it can be changed into another prime (2205877897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1102908948 + 1102908949.

It is an arithmetic number, because the mean of its divisors is an integer number (1102908949).

Almost surely, 2^2205817897 is an apocalyptic number.

It is an amenable number.

2205817897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2205817897 is an equidigital number, since it uses as much as digits as its factorization.

2205817897 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 49.

The square root of 2205817897 is about 46966.1356404804. The cubic root of 2205817897 is about 1301.7369084893.

The spelling of 2205817897 in words is "two billion, two hundred five million, eight hundred seventeen thousand, eight hundred ninety-seven".