213430444 has 24 divisors (see below), whose sum is σ = 396059328. Its totient is φ = 100289280.

The previous prime is 213430411. The next prime is 213430447. The reversal of 213430444 is 444034312.

It is not an unprimeable number, because it can be changed into a prime (213430447) 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 7 ways as a sum of consecutive naturals, for example, 53917 + ... + 57739.

It is an arithmetic number, because the mean of its divisors is an integer number (16502472).

Almost surely, 2^213430444 is an apocalyptic number.

It is an amenable number.

213430444 is a deficient number, since it is larger than the sum of its proper divisors (182628884).

213430444 is a wasteful number, since it uses less digits than its factorization.

213430444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4665 (or 4663 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 213430444 is about 14609.2588449928. The cubic root of 213430444 is about 597.6112841629.

Adding to 213430444 its reverse (444034312), we get a palindrome (657464756).

The spelling of 213430444 in words is "two hundred thirteen million, four hundred thirty thousand, four hundred forty-four".