212225533 has 4 divisors (see below), whose sum is σ = 228550588. Its totient is φ = 195900480.

The previous prime is 212225513. The next prime is 212225551. The reversal of 212225533 is 335522212.

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 69255684 + 142969849 = 8322^2 + 11957^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212225533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 212225498 and 212225507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212225513) 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 3 ways as a sum of consecutive naturals, for example, 8162508 + ... + 8162533.

It is an arithmetic number, because the mean of its divisors is an integer number (57137647).

Almost surely, 2^212225533 is an apocalyptic number.

It is an amenable number.

212225533 is a deficient number, since it is larger than the sum of its proper divisors (16325055).

212225533 is a wasteful number, since it uses less digits than its factorization.

212225533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16325054.

The product of its digits is 3600, while the sum is 25.

The square root of 212225533 is about 14567.9625548668. The cubic root of 212225533 is about 596.4845662506.

Adding to 212225533 its reverse (335522212), we get a palindrome (547747745).

The spelling of 212225533 in words is "two hundred twelve million, two hundred twenty-five thousand, five hundred thirty-three".