216943573 has 8 divisors (see below), whose sum is σ = 270475200. Its totient is φ = 169046880.

The previous prime is 216943541. The next prime is 216943589. The reversal of 216943573 is 375349612.

It is a happy number.

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 216943573 - 2⁵ = 216943541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216943873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408648 + ... + 1408801.

It is an arithmetic number, because the mean of its divisors is an integer number (33809400).

Almost surely, 2^216943573 is an apocalyptic number.

It is an amenable number.

216943573 is a deficient number, since it is larger than the sum of its proper divisors (53531627).

216943573 is a wasteful number, since it uses less digits than its factorization.

216943573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2817467.

The product of its digits is 136080, while the sum is 40.

The square root of 216943573 is about 14729.0044809553. The cubic root of 216943573 is about 600.8724095914.

The spelling of 216943573 in words is "two hundred sixteen million, nine hundred forty-three thousand, five hundred seventy-three".