217139714 has 32 divisors (see below), whose sum is σ = 375321600. Its totient is φ = 93180240.

The previous prime is 217139693. The next prime is 217139719. The reversal of 217139714 is 417931712.

217139714 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (217139719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149339 + ... + 150785.

It is an arithmetic number, because the mean of its divisors is an integer number (11728800).

Almost surely, 2^217139714 is an apocalyptic number.

217139714 is a deficient number, since it is larger than the sum of its proper divisors (158181886).

217139714 is a wasteful number, since it uses less digits than its factorization.

217139714 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1838.

The product of its digits is 10584, while the sum is 35.

The square root of 217139714 is about 14735.6613017536. The cubic root of 217139714 is about 601.0534400982.

It can be divided in two parts, 217 and 139714, that added together give a palindrome (139931).

The spelling of 217139714 in words is "two hundred seventeen million, one hundred thirty-nine thousand, seven hundred fourteen".