2261568217 has 2 divisors, whose sum is σ = 2261568218. Its totient is φ = 2261568216.

The previous prime is 2261568209. The next prime is 2261568301. The reversal of 2261568217 is 7128651622.

2261568217 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2108279056 + 153289161 = 45916^2 + 12381^2 .

It is a cyclic number.

It is not a de Polignac number, because 2261568217 - 2³ = 2261568209 is a prime.

It is a super-2 number, since 2×2261568217² = 10229381600289118178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2261568217.

It is not a weakly prime, because it can be changed into another prime (2261566217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1130784108 + 1130784109.

It is an arithmetic number, because the mean of its divisors is an integer number (1130784109).

Almost surely, 2^2261568217 is an apocalyptic number.

It is an amenable number.

2261568217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2261568217 is an equidigital number, since it uses as much as digits as its factorization.

2261568217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 80640, while the sum is 40.

The square root of 2261568217 is about 47555.9482819973. The cubic root of 2261568217 is about 1312.6125856196.

The spelling of 2261568217 in words is "two billion, two hundred sixty-one million, five hundred sixty-eight thousand, two hundred seventeen".