213235530 has 32 divisors (see below), whose sum is σ = 534017664. Its totient is φ = 54390336.

The previous prime is 213235523. The next prime is 213235531. The reversal of 213235530 is 35532312.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 213235530.

It is not an unprimeable number, because it can be changed into a prime (213235531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153829 + ... + 155208.

It is an arithmetic number, because the mean of its divisors is an integer number (16688052).

Almost surely, 2^213235530 is an apocalyptic number.

213235530 is an abundant number, since it is smaller than the sum of its proper divisors (320782134).

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

213235530 is a wasteful number, since it uses less digits than its factorization.

213235530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309070.

The product of its (nonzero) digits is 2700, while the sum is 24.

The square root of 213235530 is about 14602.5864147417. The cubic root of 213235530 is about 597.4293071829.

Adding to 213235530 its reverse (35532312), we get a palindrome (248767842).

The spelling of 213235530 in words is "two hundred thirteen million, two hundred thirty-five thousand, five hundred thirty".