213144242 has 16 divisors (see below), whose sum is σ = 336830400. Its totient is φ = 100877040.

The previous prime is 213144233. The next prime is 213144247. The reversal of 213144242 is 242441312.

It is not an unprimeable number, because it can be changed into a prime (213144247) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 77267 + ... + 79977.

It is an arithmetic number, because the mean of its divisors is an integer number (21051900).

Almost surely, 2^213144242 is an apocalyptic number.

213144242 is a deficient number, since it is larger than the sum of its proper divisors (123686158).

213144242 is a wasteful number, since it uses less digits than its factorization.

213144242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4801.

The product of its digits is 1536, while the sum is 23.

The square root of 213144242 is about 14599.4603324917. The cubic root of 213144242 is about 597.3440401057.

Adding to 213144242 its reverse (242441312), we get a palindrome (455585554).

The spelling of 213144242 in words is "two hundred thirteen million, one hundred forty-four thousand, two hundred forty-two".