217245011 has 2 divisors, whose sum is σ = 217245012. Its totient is φ = 217245010.

The previous prime is 217245001. The next prime is 217245013. The reversal of 217245011 is 110542712.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217245011 - 2¹⁰ = 217243987 is a prime.

Together with 217245013, 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 (217245013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108622505 + 108622506.

It is an arithmetic number, because the mean of its divisors is an integer number (108622506).

Almost surely, 2^217245011 is an apocalyptic number.

217245011 is a deficient number, since it is larger than the sum of its proper divisors (1).

217245011 is an equidigital number, since it uses as much as digits as its factorization.

217245011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 217245011 is about 14739.2337317786. The cubic root of 217245011 is about 601.1505801614.

Adding to 217245011 its reverse (110542712), we get a palindrome (327787723).

The spelling of 217245011 in words is "two hundred seventeen million, two hundred forty-five thousand, eleven".