217323394 has 16 divisors (see below), whose sum is σ = 333403776. Its totient is φ = 106195600.

The previous prime is 217323383. The next prime is 217323401. The reversal of 217323394 is 493323712.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90084 + ... + 92464.

It is an arithmetic number, because the mean of its divisors is an integer number (20837736).

Almost surely, 2^217323394 is an apocalyptic number.

217323394 is a deficient number, since it is larger than the sum of its proper divisors (116080382).

217323394 is a wasteful number, since it uses less digits than its factorization.

217323394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3401.

The product of its digits is 27216, while the sum is 34.

The square root of 217323394 is about 14741.8924836671. The cubic root of 217323394 is about 601.2228707667. Note that the first 3 decimals are identical.

The spelling of 217323394 in words is "two hundred seventeen million, three hundred twenty-three thousand, three hundred ninety-four".