217021352 has 16 divisors (see below), whose sum is σ = 413812800. Its totient is φ = 106671280.

The previous prime is 217021351. The next prime is 217021373. The reversal of 217021352 is 253120712.

It is a happy number.

217021352 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (217021351) 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, 229424 + ... + 230367.

It is an arithmetic number, because the mean of its divisors is an integer number (25863300).

Almost surely, 2^217021352 is an apocalyptic number.

It is an amenable number.

217021352 is a deficient number, since it is larger than the sum of its proper divisors (196791448).

217021352 is a wasteful number, since it uses less digits than its factorization.

217021352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 459856 (or 459852 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 217021352 is about 14731.6445789328. The cubic root of 217021352 is about 600.9442096305.

The spelling of 217021352 in words is "two hundred seventeen million, twenty-one thousand, three hundred fifty-two".