213405234 has 16 divisors (see below), whose sum is σ = 487783488. Its totient is φ = 60972912.

The previous prime is 213405211. The next prime is 213405253. The reversal of 213405234 is 432504312.

It is a Curzon number.

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 in 7 ways as a sum of consecutive naturals, for example, 2540497 + ... + 2540580.

It is an arithmetic number, because the mean of its divisors is an integer number (30486468).

Almost surely, 2^213405234 is an apocalyptic number.

213405234 is an abundant number, since it is smaller than the sum of its proper divisors (274378254).

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

213405234 is a wasteful number, since it uses less digits than its factorization.

213405234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5081089.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 213405234 is about 14608.3960105140. The cubic root of 213405234 is about 597.5877536652.

Adding to 213405234 its reverse (432504312), we get a palindrome (645909546).

The spelling of 213405234 in words is "two hundred thirteen million, four hundred five thousand, two hundred thirty-four".