213043530 has 32 divisors (see below), whose sum is σ = 584348544. Its totient is φ = 48695616.

The previous prime is 213043489. The next prime is 213043531. The reversal of 213043530 is 35340312.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 213043497 and 213043506.

It is not an unprimeable number, because it can be changed into a prime (213043531) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 507037 + ... + 507456.

It is an arithmetic number, because the mean of its divisors is an integer number (18260892).

Almost surely, 2^213043530 is an apocalyptic number.

213043530 is an abundant number, since it is smaller than the sum of its proper divisors (371305014).

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

213043530 is a wasteful number, since it uses less digits than its factorization.

213043530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014510.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 213043530 is about 14596.0107563676. The cubic root of 213043530 is about 597.2499423401.

Adding to 213043530 its reverse (35340312), we get a palindrome (248383842).

The spelling of 213043530 in words is "two hundred thirteen million, forty-three thousand, five hundred thirty".