216833353 has 4 divisors (see below), whose sum is σ = 236545488. Its totient is φ = 197121220.

The previous prime is 216833347. The next prime is 216833371. The reversal of 216833353 is 353338612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216833353 - 2⁵ = 216833321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216833303) 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, 9856051 + ... + 9856072.

It is an arithmetic number, because the mean of its divisors is an integer number (59136372).

Almost surely, 2^216833353 is an apocalyptic number.

It is an amenable number.

216833353 is a deficient number, since it is larger than the sum of its proper divisors (19712135).

216833353 is a wasteful number, since it uses less digits than its factorization.

216833353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19712134.

The product of its digits is 38880, while the sum is 34.

The square root of 216833353 is about 14725.2624085277. The cubic root of 216833353 is about 600.7706329325.

It can be divided in two parts, 216 and 833353, that added together give a square (833569 = 913²).

The spelling of 216833353 in words is "two hundred sixteen million, eight hundred thirty-three thousand, three hundred fifty-three".