217996 has 6 divisors (see below), whose sum is σ = 381500. Its totient is φ = 108996.

The previous prime is 217981. The next prime is 218003. The reversal of 217996 is 699712.

217996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27246 + ... + 27253.

2²¹⁷⁹⁹⁶ is an apocalyptic number.

It is an amenable number.

217996 is a deficient number, since it is larger than the sum of its proper divisors (163504).

217996 is a wasteful number, since it uses less digits than its factorization.

217996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54503 (or 54501 counting only the distinct ones).

The product of its digits is 6804, while the sum is 34.

The square root of 217996 is about 466.9004176481. The cubic root of 217996 is about 60.1842484442.

The spelling of 217996 in words is "two hundred seventeen thousand, nine hundred ninety-six".