217696 has 12 divisors (see below), whose sum is σ = 428652. Its totient is φ = 108832.

The previous prime is 217691. The next prime is 217697. The reversal of 217696 is 696712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3370 + ... + 3433.

It is an arithmetic number, because the mean of its divisors is an integer number (35721).

2²¹⁷⁶⁹⁶ is an apocalyptic number.

It is an amenable number.

217696 is a deficient number, since it is larger than the sum of its proper divisors (210956).

217696 is an equidigital number, since it uses as much as digits as its factorization.

217696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6813 (or 6805 counting only the distinct ones).

The product of its digits is 4536, while the sum is 31.

The square root of 217696 is about 466.5790393920. The cubic root of 217696 is about 60.1566278101.

The spelling of 217696 in words is "two hundred seventeen thousand, six hundred ninety-six".