213404330 has 16 divisors (see below), whose sum is σ = 397374120. Its totient is φ = 82418112.

The previous prime is 213404311. The next prime is 213404353. The reversal of 213404330 is 33404312.

213404330 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 208426969 + 4977361 = 14437^2 + 2231^2 .

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, 367649 + ... + 368228.

Almost surely, 2^213404330 is an apocalyptic number.

213404330 is a deficient number, since it is larger than the sum of its proper divisors (183969790).

213404330 is a wasteful number, since it uses less digits than its factorization.

213404330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 735913.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 213404330 is about 14608.3650693704. The cubic root of 213404330 is about 597.5869098557.

Adding to 213404330 its reverse (33404312), we get a palindrome (246808642).

The spelling of 213404330 in words is "two hundred thirteen million, four hundred four thousand, three hundred thirty".