213042234 has 32 divisors (see below), whose sum is σ = 431464320. Its totient is φ = 70123712.

The previous prime is 213042233. The next prime is 213042239. The reversal of 213042234 is 432240312.

It is a self number, because there is not a number n which added to its sum of digits gives 213042234.

It is not an unprimeable number, because it can be changed into a prime (213042233) 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 15 ways as a sum of consecutive naturals, for example, 172732 + ... + 173960.

It is an arithmetic number, because the mean of its divisors is an integer number (13483260).

Almost surely, 2^213042234 is an apocalyptic number.

213042234 is an abundant number, since it is smaller than the sum of its proper divisors (218422086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213042234 is a wasteful number, since it uses less digits than its factorization.

213042234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 213042234 is about 14595.9663606080. The cubic root of 213042234 is about 597.2487312614.

Adding to 213042234 its reverse (432240312), we get a palindrome (645282546).

The spelling of 213042234 in words is "two hundred thirteen million, forty-two thousand, two hundred thirty-four".