212204442 has 16 divisors (see below), whose sum is σ = 424782432. Its totient is φ = 70672560.

The previous prime is 212204429. The next prime is 212204449. The reversal of 212204442 is 244402212.

It is not an unprimeable number, because it can be changed into a prime (212204449) 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, 7888 + ... + 22059.

It is an arithmetic number, because the mean of its divisors is an integer number (26548902).

Almost surely, 2^212204442 is an apocalyptic number.

212204442 is an abundant number, since it is smaller than the sum of its proper divisors (212577990).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

212204442 is a wasteful number, since it uses less digits than its factorization.

212204442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31133.

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 212204442 is about 14567.2386539110. The cubic root of 212204442 is about 596.4648060258.

Adding to 212204442 its reverse (244402212), we get a palindrome (456606654).

The spelling of 212204442 in words is "two hundred twelve million, two hundred four thousand, four hundred forty-two".