217340 has 12 divisors (see below), whose sum is σ = 456456. Its totient is φ = 86928.

The previous prime is 217339. The next prime is 217351. The reversal of 217340 is 43712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5414 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (38038).

2²¹⁷³⁴⁰ is an apocalyptic number.

217340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217340 is an abundant number, since it is smaller than the sum of its proper divisors (239116).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217340 is a wasteful number, since it uses less digits than its factorization.

217340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10876 (or 10874 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 217340 is about 466.1973830900. The cubic root of 217340 is about 60.1238183818.

The spelling of 217340 in words is "two hundred seventeen thousand, three hundred forty", and thus it is an iban number.