217353968 has 20 divisors (see below), whose sum is σ = 453517848. Its totient is φ = 100317120.

The previous prime is 217353967. The next prime is 217353971. The reversal of 217353968 is 869353712.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217353967) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 522278 + ... + 522693.

Almost surely, 2^217353968 is an apocalyptic number.

It is an amenable number.

217353968 is an abundant number, since it is smaller than the sum of its proper divisors (236163880).

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

217353968 is a wasteful number, since it uses less digits than its factorization.

217353968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1044992 (or 1044986 counting only the distinct ones).

The product of its digits is 272160, while the sum is 44.

The square root of 217353968 is about 14742.9294239646. The cubic root of 217353968 is about 601.2510636605.

The spelling of 217353968 in words is "two hundred seventeen million, three hundred fifty-three thousand, nine hundred sixty-eight".