217402 has 8 divisors (see below), whose sum is σ = 330912. Its totient is φ = 107100.

The previous prime is 217397. The next prime is 217409. The reversal of 217402 is 204712.

217402 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (217409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624 + ... + 907.

It is an arithmetic number, because the mean of its divisors is an integer number (41364).

2²¹⁷⁴⁰² is an apocalyptic number.

217402 is a deficient number, since it is larger than the sum of its proper divisors (113510).

217402 is a wasteful number, since it uses less digits than its factorization.

217402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1604.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 217402 is about 466.2638737882. The cubic root of 217402 is about 60.1295349585.

The spelling of 217402 in words is "two hundred seventeen thousand, four hundred two", and thus it is an iban number.