213440330 has 8 divisors (see below), whose sum is σ = 384192612. Its totient is φ = 85376128.

The previous prime is 213440323. The next prime is 213440333. The reversal of 213440330 is 33044312.

It can be written as a sum of positive squares in 2 ways, for example, as 213247609 + 192721 = 14603^2 + 439^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (213440333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10672007 + ... + 10672026.

Almost surely, 2^213440330 is an apocalyptic number.

213440330 is a deficient number, since it is larger than the sum of its proper divisors (170752282).

213440330 is a wasteful number, since it uses less digits than its factorization.

213440330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21344040.

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

The square root of 213440330 is about 14609.5971881500. The cubic root of 213440330 is about 597.6205110470.

Adding to 213440330 its reverse (33044312), we get a palindrome (246484642).

The spelling of 213440330 in words is "two hundred thirteen million, four hundred forty thousand, three hundred thirty".