217424713 has 16 divisors (see below), whose sum is σ = 251665920. Its totient is φ = 185644800.

The previous prime is 217424699. The next prime is 217424717. The reversal of 217424713 is 317424712.

It is a de Polignac number, because none of the positive numbers 2^k-217424713 is a prime.

It is not an unprimeable number, because it can be changed into a prime (217424717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122728 + ... + 124486.

It is an arithmetic number, because the mean of its divisors is an integer number (15729120).

Almost surely, 2^217424713 is an apocalyptic number.

It is an amenable number.

217424713 is a deficient number, since it is larger than the sum of its proper divisors (34241207).

217424713 is a wasteful number, since it uses less digits than its factorization.

217424713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448.

The product of its digits is 9408, while the sum is 31.

The square root of 217424713 is about 14745.3285144821. The cubic root of 217424713 is about 601.3162888979.

Subtracting 217424713 from its reverse (317424712), we obtain a palindrome (99999999).

The spelling of 217424713 in words is "two hundred seventeen million, four hundred twenty-four thousand, seven hundred thirteen".