217114013 has 2 divisors, whose sum is σ = 217114014. Its totient is φ = 217114012.

The previous prime is 217114003. The next prime is 217114057. The reversal of 217114013 is 310411712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 192293689 + 24820324 = 13867^2 + 4982^2 .

It is a cyclic number.

It is not a de Polignac number, because 217114013 - 2¹⁰ = 217112989 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217114003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108557006 + 108557007.

It is an arithmetic number, because the mean of its divisors is an integer number (108557007).

Almost surely, 2^217114013 is an apocalyptic number.

It is an amenable number.

217114013 is a deficient number, since it is larger than the sum of its proper divisors (1).

217114013 is an equidigital number, since it uses as much as digits as its factorization.

217114013 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 20.

The square root of 217114013 is about 14734.7892078577. The cubic root of 217114013 is about 601.0297252839.

Adding to 217114013 its reverse (310411712), we get a palindrome (527525725).

The spelling of 217114013 in words is "two hundred seventeen million, one hundred fourteen thousand, thirteen".