2221885217 has 2 divisors, whose sum is σ = 2221885218. Its totient is φ = 2221885216.

The previous prime is 2221885157. The next prime is 2221885219. The reversal of 2221885217 is 7125881222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1565705761 + 656179456 = 39569^2 + 25616^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221885217 - 2⁶ = 2221885153 is a prime.

Together with 2221885219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2221885219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110942608 + 1110942609.

It is an arithmetic number, because the mean of its divisors is an integer number (1110942609).

Almost surely, 2^2221885217 is an apocalyptic number.

It is an amenable number.

2221885217 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221885217 is an equidigital number, since it uses as much as digits as its factorization.

2221885217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35840, while the sum is 38.

The square root of 2221885217 is about 47136.8774634044. The cubic root of 2221885217 is about 1304.8899105127.

The spelling of 2221885217 in words is "two billion, two hundred twenty-one million, eight hundred eighty-five thousand, two hundred seventeen".