217005293 has 4 divisors (see below), whose sum is σ = 217402560. Its totient is φ = 216608028.

The previous prime is 217005263. The next prime is 217005307. The reversal of 217005293 is 392500712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 217005293 - 2¹⁴ = 216988909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217005233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197813 + ... + 198906.

It is an arithmetic number, because the mean of its divisors is an integer number (54350640).

Almost surely, 2^217005293 is an apocalyptic number.

It is an amenable number.

217005293 is a deficient number, since it is larger than the sum of its proper divisors (397267).

217005293 is an equidigital number, since it uses as much as digits as its factorization.

217005293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397266.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 217005293 is about 14731.0995176871. The cubic root of 217005293 is about 600.9293865097.

The spelling of 217005293 in words is "two hundred seventeen million, five thousand, two hundred ninety-three".