217222996 has 12 divisors (see below), whose sum is σ = 380318400. Its totient is φ = 108560600.

The previous prime is 217222981. The next prime is 217222997. The reversal of 217222996 is 699222712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217222997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146 + ... + 20953.

It is an arithmetic number, because the mean of its divisors is an integer number (31693200).

Almost surely, 2^217222996 is an apocalyptic number.

It is an amenable number.

217222996 is a deficient number, since it is larger than the sum of its proper divisors (163095404).

217222996 is a wasteful number, since it uses less digits than its factorization.

217222996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25454 (or 25452 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 217222996 is about 14738.4868965576. The cubic root of 217222996 is about 601.1302731710.

The spelling of 217222996 in words is "two hundred seventeen million, two hundred twenty-two thousand, nine hundred ninety-six".