217040041 has 4 divisors (see below), whose sum is σ = 217085184. Its totient is φ = 216994900.

The previous prime is 217040027. The next prime is 217040051. The reversal of 217040041 is 140040712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 217040041 - 2⁵ = 217040009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217040051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14365 + ... + 25306.

It is an arithmetic number, because the mean of its divisors is an integer number (54271296).

Almost surely, 2^217040041 is an apocalyptic number.

It is an amenable number.

217040041 is a deficient number, since it is larger than the sum of its proper divisors (45143).

217040041 is an equidigital number, since it uses as much as digits as its factorization.

217040041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45142.

The product of its (nonzero) digits is 224, while the sum is 19.

The square root of 217040041 is about 14732.2788800647. The cubic root of 217040041 is about 600.9614594293.

Adding to 217040041 its reverse (140040712), we get a palindrome (357080753).

The spelling of 217040041 in words is "two hundred seventeen million, forty thousand, forty-one".