217067982 has 16 divisors (see below), whose sum is σ = 440083920. Its totient is φ = 71364672.

The previous prime is 217067971. The next prime is 217067993. The reversal of 217067982 is 289760712.

217067982 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (217067971) and next prime (217067993).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247357 + ... + 248232.

It is an arithmetic number, because the mean of its divisors is an integer number (27505245).

Almost surely, 2^217067982 is an apocalyptic number.

217067982 is an abundant number, since it is smaller than the sum of its proper divisors (223015938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217067982 is a wasteful number, since it uses less digits than its factorization.

217067982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495667.

The product of its (nonzero) digits is 84672, while the sum is 42.

The square root of 217067982 is about 14733.2271413971. The cubic root of 217067982 is about 600.9872469039.

The spelling of 217067982 in words is "two hundred seventeen million, sixty-seven thousand, nine hundred eighty-two".