213404530 has 16 divisors (see below), whose sum is σ = 394510680. Its totient is φ = 83054592.

The previous prime is 213404501. The next prime is 213404531. The reversal of 213404530 is 35404312.

213404530 is digitally balanced in base 2, 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 148328041 + 65076489 = 12179^2 + 8067^2 .

It is not an unprimeable number, because it can be changed into a prime (213404531) 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, 288015 + ... + 288754.

Almost surely, 2^213404530 is an apocalyptic number.

213404530 is a deficient number, since it is larger than the sum of its proper divisors (181106150).

213404530 is a wasteful number, since it uses less digits than its factorization.

213404530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576813.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 213404530 is about 14608.3719147618. The cubic root of 213404530 is about 597.5870965394.

Adding to 213404530 its reverse (35404312), we get a palindrome (248808842).

The spelling of 213404530 in words is "two hundred thirteen million, four hundred four thousand, five hundred thirty".