213213522 has 32 divisors (see below), whose sum is σ = 437310720. Its totient is φ = 69264720.

The previous prime is 213213503. The next prime is 213213529. The reversal of 213213522 is 225312312.

It is not an unprimeable number, because it can be changed into a prime (213213529) 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, 208729 + ... + 209747.

It is an arithmetic number, because the mean of its divisors is an integer number (13665960).

Almost surely, 2^213213522 is an apocalyptic number.

213213522 is an abundant number, since it is smaller than the sum of its proper divisors (224097198).

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

213213522 is a wasteful number, since it uses less digits than its factorization.

213213522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1878.

The product of its digits is 720, while the sum is 21.

The square root of 213213522 is about 14601.8328301621. The cubic root of 213213522 is about 597.4087529526.

Adding to 213213522 its reverse (225312312), we get a palindrome (438525834).

The spelling of 213213522 in words is "two hundred thirteen million, two hundred thirteen thousand, five hundred twenty-two".