217483394 has 4 divisors (see below), whose sum is σ = 326225094. Its totient is φ = 108741696.

The previous prime is 217483391. The next prime is 217483403. The reversal of 217483394 is 493384712.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 149206225 + 68277169 = 12215^2 + 8263^2 .

It is not an unprimeable number, because it can be changed into a prime (217483391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54370847 + ... + 54370850.

Almost surely, 2^217483394 is an apocalyptic number.

217483394 is a deficient number, since it is larger than the sum of its proper divisors (108741700).

217483394 is a wasteful number, since it uses less digits than its factorization.

217483394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108741699.

The product of its digits is 145152, while the sum is 41.

The square root of 217483394 is about 14747.3181968791. The cubic root of 217483394 is about 601.3703806748.

The spelling of 217483394 in words is "two hundred seventeen million, four hundred eighty-three thousand, three hundred ninety-four".