213201217 has 2 divisors, whose sum is σ = 213201218. Its totient is φ = 213201216.

The previous prime is 213201193. The next prime is 213201227. The reversal of 213201217 is 712102312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201668401 + 11532816 = 14201^2 + 3396^2 .

It is a cyclic number.

It is not a de Polignac number, because 213201217 - 2⁷ = 213201089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213201194 and 213201203.

It is not a weakly prime, because it can be changed into another prime (213201227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106600608 + 106600609.

It is an arithmetic number, because the mean of its divisors is an integer number (106600609).

Almost surely, 2^213201217 is an apocalyptic number.

It is an amenable number.

213201217 is a deficient number, since it is larger than the sum of its proper divisors (1).

213201217 is an equidigital number, since it uses as much as digits as its factorization.

213201217 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 213201217 is about 14601.4114728680. The cubic root of 213201217 is about 597.3972601604.

Adding to 213201217 its reverse (712102312), we get a palindrome (925303529).

The spelling of 213201217 in words is "two hundred thirteen million, two hundred one thousand, two hundred seventeen".