212424242 has 4 divisors (see below), whose sum is σ = 318636366. Its totient is φ = 106212120.

The previous prime is 212424227. The next prime is 212424283. The reversal of 212424242 is 242424212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 205606921 + 6817321 = 14339^2 + 2611^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 53106059 + ... + 53106062.

Almost surely, 2^212424242 is an apocalyptic number.

212424242 is a deficient number, since it is larger than the sum of its proper divisors (106212124).

212424242 is a wasteful number, since it uses less digits than its factorization.

212424242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106212123.

The product of its digits is 2048, while the sum is 23.

The square root of 212424242 is about 14574.7810275146. The cubic root of 212424242 is about 596.6706731037.

Adding to 212424242 its reverse (242424212), we get a palindrome (454848454).

The spelling of 212424242 in words is "two hundred twelve million, four hundred twenty-four thousand, two hundred forty-two".