213440234 has 16 divisors (see below), whose sum is σ = 366702336. Its totient is φ = 91273200.

The previous prime is 213440231. The next prime is 213440257. The reversal of 213440234 is 432044312.

It is not an unprimeable number, because it can be changed into a prime (213440231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10082 + ... + 22989.

It is an arithmetic number, because the mean of its divisors is an integer number (22918896).

Almost surely, 2^213440234 is an apocalyptic number.

213440234 is a deficient number, since it is larger than the sum of its proper divisors (153262102).

213440234 is a wasteful number, since it uses less digits than its factorization.

213440234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33541.

The product of its (nonzero) digits is 2304, while the sum is 23.

The square root of 213440234 is about 14609.5939026381. The cubic root of 213440234 is about 597.6204214489.

Adding to 213440234 its reverse (432044312), we get a palindrome (645484546).

The spelling of 213440234 in words is "two hundred thirteen million, four hundred forty thousand, two hundred thirty-four".