213040444 has 12 divisors (see below), whose sum is σ = 389030544. Its totient is φ = 101888864.

The previous prime is 213040441. The next prime is 213040459. The reversal of 213040444 is 444040312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213040441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1157737 + ... + 1157920.

It is an arithmetic number, because the mean of its divisors is an integer number (32419212).

Almost surely, 2^213040444 is an apocalyptic number.

It is an amenable number.

213040444 is a deficient number, since it is larger than the sum of its proper divisors (175990100).

213040444 is a wasteful number, since it uses less digits than its factorization.

213040444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315684 (or 2315682 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 213040444 is about 14595.9050421685. The cubic root of 213040444 is about 597.2470585442.

Adding to 213040444 its reverse (444040312), we get a palindrome (657080756).

The spelling of 213040444 in words is "two hundred thirteen million, forty thousand, four hundred forty-four".