217290982 has 24 divisors (see below), whose sum is σ = 346598280. Its totient is φ = 102160388.

The previous prime is 217290971. The next prime is 217290989. The reversal of 217290982 is 289092712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217290989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3682869 + ... + 3682927.

It is an arithmetic number, because the mean of its divisors is an integer number (14441595).

Almost surely, 2^217290982 is an apocalyptic number.

217290982 is a deficient number, since it is larger than the sum of its proper divisors (129307298).

217290982 is an frugal number, since it uses more digits than its factorization.

217290982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 217290982 is about 14740.7931265587. The cubic root of 217290982 is about 601.1929801290.

The spelling of 217290982 in words is "two hundred seventeen million, two hundred ninety thousand, nine hundred eighty-two".