217365468 has 48 divisors (see below), whose sum is σ = 538513920. Its totient is φ = 68003584.

The previous prime is 217365427. The next prime is 217365503. The reversal of 217365468 is 864563712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84205 + ... + 86747.

It is an arithmetic number, because the mean of its divisors is an integer number (11219040).

Almost surely, 2^217365468 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 217365468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (269256960).

217365468 is an abundant number, since it is smaller than the sum of its proper divisors (321148452).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217365468 is a wasteful number, since it uses less digits than its factorization.

217365468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2986 (or 2984 counting only the distinct ones).

The product of its digits is 241920, while the sum is 42.

The square root of 217365468 is about 14743.3194362735. The cubic root of 217365468 is about 601.2616673551.

The spelling of 217365468 in words is "two hundred seventeen million, three hundred sixty-five thousand, four hundred sixty-eight".