217082704 has 20 divisors (see below), whose sum is σ = 421071264. Its totient is φ = 108419168.

The previous prime is 217082693. The next prime is 217082729. The reversal of 217082704 is 407280712.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7989 + ... + 22315.

Almost surely, 2^217082704 is an apocalyptic number.

It is an amenable number.

217082704 is a deficient number, since it is larger than the sum of its proper divisors (203988560).

217082704 is a wasteful number, since it uses less digits than its factorization.

217082704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15282 (or 15276 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 217082704 is about 14733.7267519118. The cubic root of 217082704 is about 601.0008333299. Note that the first 3 decimals are identical.

The spelling of 217082704 in words is "two hundred seventeen million, eighty-two thousand, seven hundred four".