217968901 has 8 divisors (see below), whose sum is σ = 226840320. Its totient is φ = 209187888.

The previous prime is 217968899. The next prime is 217968923. The reversal of 217968901 is 109869712.

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

It is a cyclic number.

It is not a de Polignac number, because 217968901 - 2¹ = 217968899 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217968301) 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, 17661 + ... + 27346.

It is an arithmetic number, because the mean of its divisors is an integer number (28355040).

Almost surely, 2^217968901 is an apocalyptic number.

It is an amenable number.

217968901 is a deficient number, since it is larger than the sum of its proper divisors (8871419).

217968901 is a wasteful number, since it uses less digits than its factorization.

217968901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45203.

The product of its (nonzero) digits is 54432, while the sum is 43.

The square root of 217968901 is about 14763.7698776430. The cubic root of 217968901 is about 601.8175451381.

The spelling of 217968901 in words is "two hundred seventeen million, nine hundred sixty-eight thousand, nine hundred one".