221201713 has 2 divisors, whose sum is σ = 221201714. Its totient is φ = 221201712.

The previous prime is 221201711. The next prime is 221201737. The reversal of 221201713 is 317102122.

221201713 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., 171400464 + 49801249 = 13092^2 + 7057^2 .

It is a cyclic number.

It is not a de Polignac number, because 221201713 - 2¹ = 221201711 is a prime.

Together with 221201711, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (221201711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110600856 + 110600857.

It is an arithmetic number, because the mean of its divisors is an integer number (110600857).

Almost surely, 2^221201713 is an apocalyptic number.

It is an amenable number.

221201713 is a deficient number, since it is larger than the sum of its proper divisors (1).

221201713 is an equidigital number, since it uses as much as digits as its factorization.

221201713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 221201713 is about 14872.8515423237. The cubic root of 221201713 is about 604.7782471685.

Adding to 221201713 its reverse (317102122), we get a palindrome (538303835).

The spelling of 221201713 in words is "two hundred twenty-one million, two hundred one thousand, seven hundred thirteen".