212204242 has 8 divisors (see below), whose sum is σ = 318383100. Its totient is φ = 106076544.

The previous prime is 212204227. The next prime is 212204243. The reversal of 212204242 is 242402212.

It can be written as a sum of positive squares in 2 ways, for example, as 175006441 + 37197801 = 13229^2 + 6099^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (212204243) 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, 234 + ... + 20602.

Almost surely, 2^212204242 is an apocalyptic number.

212204242 is a deficient number, since it is larger than the sum of its proper divisors (106178858).

212204242 is a wasteful number, since it uses less digits than its factorization.

212204242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25580.

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 212204242 is about 14567.2317891904. The cubic root of 212204242 is about 596.4646186389.

Adding to 212204242 its reverse (242402212), we get a palindrome (454606454).

The spelling of 212204242 in words is "two hundred twelve million, two hundred four thousand, two hundred forty-two".