217148289 has 8 divisors (see below), whose sum is σ = 289755840. Its totient is φ = 144653136.

The previous prime is 217148249. The next prime is 217148297. The reversal of 217148289 is 982841712.

217148289 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 217148289 - 2²⁵ = 183593857 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 217148289.

It is not an unprimeable number, because it can be changed into a prime (217148219) 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, 23482 + ... + 31395.

It is an arithmetic number, because the mean of its divisors is an integer number (36219480).

Almost surely, 2^217148289 is an apocalyptic number.

It is an amenable number.

217148289 is a deficient number, since it is larger than the sum of its proper divisors (72607551).

217148289 is a wasteful number, since it uses less digits than its factorization.

217148289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56199.

The product of its digits is 64512, while the sum is 42.

The square root of 217148289 is about 14735.9522596947. The cubic root of 217148289 is about 601.0613520018.

It can be divided in two parts, 21714 and 8289, that added together give a palindrome (30003).

The spelling of 217148289 in words is "two hundred seventeen million, one hundred forty-eight thousand, two hundred eighty-nine".