213434242 has 16 divisors (see below), whose sum is σ = 371886912. Its totient is φ = 89971920.

The previous prime is 213434237. The next prime is 213434279. The reversal of 213434242 is 242434312.

It is a happy number.

It is a super-2 number, since 2×213434242² = 91108351316229128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124108 + ... + 125815.

It is an arithmetic number, because the mean of its divisors is an integer number (23242932).

Almost surely, 2^213434242 is an apocalyptic number.

213434242 is a deficient number, since it is larger than the sum of its proper divisors (158452670).

213434242 is a wasteful number, since it uses less digits than its factorization.

213434242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249993.

The product of its digits is 4608, while the sum is 25.

The square root of 213434242 is about 14609.3888304747. The cubic root of 213434242 is about 597.6148289777.

Adding to 213434242 its reverse (242434312), we get a palindrome (455868554).

The spelling of 213434242 in words is "two hundred thirteen million, four hundred thirty-four thousand, two hundred forty-two".