212240242 has 8 divisors (see below), whose sum is σ = 318423132. Its totient is φ = 106099200.

The previous prime is 212240239. The next prime is 212240243. The reversal of 212240242 is 242042212.

212240242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 210221001 + 2019241 = 14499^2 + 1421^2 .

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 (212240243) 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, 11142 + ... + 23422.

Almost surely, 2^212240242 is an apocalyptic number.

212240242 is a deficient number, since it is larger than the sum of its proper divisors (106182890).

212240242 is a wasteful number, since it uses less digits than its factorization.

212240242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20924.

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

The square root of 212240242 is about 14568.4673867912. The cubic root of 212240242 is about 596.4983463846.

Adding to 212240242 its reverse (242042212), we get a palindrome (454282454).

The spelling of 212240242 in words is "two hundred twelve million, two hundred forty thousand, two hundred forty-two".