212216033 has 4 divisors (see below), whose sum is σ = 212537748. Its totient is φ = 211894320.

The previous prime is 212216023. The next prime is 212216047. The reversal of 212216033 is 330612212.

It is a happy number.

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 138462289 + 73753744 = 11767^2 + 8588^2 .

It is a cyclic number.

It is not a de Polignac number, because 212216033 - 2²⁶ = 145107169 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212215996 and 212216014.

It is not an unprimeable number, because it can be changed into a prime (212216003) 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, 159866 + ... + 161187.

It is an arithmetic number, because the mean of its divisors is an integer number (53134437).

Almost surely, 2^212216033 is an apocalyptic number.

It is an amenable number.

212216033 is a deficient number, since it is larger than the sum of its proper divisors (321715).

212216033 is an equidigital number, since it uses as much as digits as its factorization.

212216033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321714.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 212216033 is about 14567.6364932682. The cubic root of 212216033 is about 596.4756658325.

Adding to 212216033 its reverse (330612212), we get a palindrome (542828245).

The spelling of 212216033 in words is "two hundred twelve million, two hundred sixteen thousand, thirty-three".