217342 has 8 divisors (see below), whose sum is σ = 328032. Its totient is φ = 108000.

The previous prime is 217339. The next prime is 217351. The reversal of 217342 is 243712.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342 + ... + 742.

It is an arithmetic number, because the mean of its divisors is an integer number (41004).

2²¹⁷³⁴² is an apocalyptic number.

217342 is a deficient number, since it is larger than the sum of its proper divisors (110690).

217342 is a wasteful number, since it uses less digits than its factorization.

217342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 674.

The product of its digits is 336, while the sum is 19.

The square root of 217342 is about 466.1995280993. The cubic root of 217342 is about 60.1240028044.

It can be divided in two parts, 21734 and 2, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 217342 in words is "two hundred seventeen thousand, three hundred forty-two", and thus it is an iban number.