217382068 has 6 divisors (see below), whose sum is σ = 380418626. Its totient is φ = 108691032.

The previous prime is 217382029. The next prime is 217382089. The reversal of 217382068 is 860283712.

It can be written as a sum of positive squares in only one way, i.e., 173132964 + 44249104 = 13158^2 + 6652^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27172755 + ... + 27172762.

Almost surely, 2^217382068 is an apocalyptic number.

It is an amenable number.

217382068 is a deficient number, since it is larger than the sum of its proper divisors (163036558).

217382068 is a wasteful number, since it uses less digits than its factorization.

217382068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54345521 (or 54345519 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 217382068 is about 14743.8823923687. The cubic root of 217382068 is about 601.2769728982.

It can be divided in two parts, 21 and 7382068, that added together give a square (7382089 = 2717²).

The spelling of 217382068 in words is "two hundred seventeen million, three hundred eighty-two thousand, sixty-eight".