221005241 has 2 divisors, whose sum is σ = 221005242. Its totient is φ = 221005240.

The previous prime is 221005223. The next prime is 221005247. The reversal of 221005241 is 142500122.

221005241 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., 132250000 + 88755241 = 11500^2 + 9421^2 .

It is a cyclic number.

It is not a de Polignac number, because 221005241 - 2¹⁴ = 220988857 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (221005247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110502620 + 110502621.

It is an arithmetic number, because the mean of its divisors is an integer number (110502621).

Almost surely, 2^221005241 is an apocalyptic number.

It is an amenable number.

221005241 is a deficient number, since it is larger than the sum of its proper divisors (1).

221005241 is an equidigital number, since it uses as much as digits as its factorization.

221005241 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 221005241 is about 14866.2450201791. The cubic root of 221005241 is about 604.5991388682.

Adding to 221005241 its reverse (142500122), we get a palindrome (363505363).

The spelling of 221005241 in words is "two hundred twenty-one million, five thousand, two hundred forty-one".