217240063 has 16 divisors (see below), whose sum is σ = 227174400. Its totient is φ = 207589536.

The previous prime is 217240039. The next prime is 217240087. The reversal of 217240063 is 360042712.

It is an interprime number because it is at equal distance from previous prime (217240039) and next prime (217240087).

It is a cyclic number.

It is not a de Polignac number, because 217240063 - 2²¹ = 215142911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217240003) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 468970 + ... + 469432.

It is an arithmetic number, because the mean of its divisors is an integer number (14198400).

Almost surely, 2^217240063 is an apocalyptic number.

217240063 is a deficient number, since it is larger than the sum of its proper divisors (9934337).

217240063 is a wasteful number, since it uses less digits than its factorization.

217240063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726.

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 217240063 is about 14739.0658794918. The cubic root of 217240063 is about 601.1460161661.

Adding to 217240063 its reverse (360042712), we get a palindrome (577282775).

The spelling of 217240063 in words is "two hundred seventeen million, two hundred forty thousand, sixty-three".