217393485 has 8 divisors (see below), whose sum is σ = 347829600. Its totient is φ = 115943184.

The previous prime is 217393469. The next prime is 217393487. The reversal of 217393485 is 584393712.

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

It is not a de Polignac number, because 217393485 - 2⁴ = 217393469 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217393487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7246435 + ... + 7246464.

It is an arithmetic number, because the mean of its divisors is an integer number (43478700).

Almost surely, 2^217393485 is an apocalyptic number.

It is an amenable number.

217393485 is a deficient number, since it is larger than the sum of its proper divisors (130436115).

217393485 is a wasteful number, since it uses less digits than its factorization.

217393485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14492907.

The product of its digits is 181440, while the sum is 42.

The square root of 217393485 is about 14744.2695648174. The cubic root of 217393485 is about 601.2874991560.

The spelling of 217393485 in words is "two hundred seventeen million, three hundred ninety-three thousand, four hundred eighty-five".