213530442 has 16 divisors (see below), whose sum is σ = 427204800. Its totient is φ = 71152832.

The previous prime is 213530437. The next prime is 213530453. The reversal of 213530442 is 244035312.

It is a super-3 number, since 3×213530442³ (a number of 26 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29059 + ... + 35657.

It is an arithmetic number, because the mean of its divisors is an integer number (26700300).

Almost surely, 2^213530442 is an apocalyptic number.

213530442 is an abundant number, since it is smaller than the sum of its proper divisors (213674358).

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

213530442 is a wasteful number, since it uses less digits than its factorization.

213530442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11997.

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 213530442 is about 14612.6808628670. The cubic root of 213530442 is about 597.7046020005.

Adding to 213530442 its reverse (244035312), we get a palindrome (457565754).

The spelling of 213530442 in words is "two hundred thirteen million, five hundred thirty thousand, four hundred forty-two".