216343033 has 4 divisors (see below), whose sum is σ = 222190180. Its totient is φ = 210495888.

The previous prime is 216343013. The next prime is 216343051. The reversal of 216343033 is 330343612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 206439424 + 9903609 = 14368^2 + 3147^2 .

It is a cyclic number.

It is not a de Polignac number, because 216343033 - 2²⁵ = 182788601 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216342989 and 216343007.

It is not an unprimeable number, because it can be changed into a prime (216343013) 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, 2923518 + ... + 2923591.

It is an arithmetic number, because the mean of its divisors is an integer number (55547545).

Almost surely, 2^216343033 is an apocalyptic number.

It is an amenable number.

216343033 is a deficient number, since it is larger than the sum of its proper divisors (5847147).

216343033 is an equidigital number, since it uses as much as digits as its factorization.

216343033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5847146.

The product of its (nonzero) digits is 3888, while the sum is 25.

The square root of 216343033 is about 14708.6040466116. The cubic root of 216343033 is about 600.3174551556.

Adding to 216343033 its reverse (330343612), we get a palindrome (546686645).

The spelling of 216343033 in words is "two hundred sixteen million, three hundred forty-three thousand, thirty-three".