217422193 has 8 divisors (see below), whose sum is σ = 225118080. Its totient is φ = 209739600.

The previous prime is 217422167. The next prime is 217422199. The reversal of 217422193 is 391224712.

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

It is not a de Polignac number, because 217422193 - 2⁹ = 217421681 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (217422199) 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, 39496 + ... + 44662.

It is an arithmetic number, because the mean of its divisors is an integer number (28139760).

Almost surely, 2^217422193 is an apocalyptic number.

It is an amenable number.

217422193 is a deficient number, since it is larger than the sum of its proper divisors (7695887).

217422193 is a wasteful number, since it uses less digits than its factorization.

217422193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6647.

The product of its digits is 6048, while the sum is 31.

The square root of 217422193 is about 14745.2430634425. The cubic root of 217422193 is about 601.3139657598.

The spelling of 217422193 in words is "two hundred seventeen million, four hundred twenty-two thousand, one hundred ninety-three".