213213431444 has 24 divisors (see below), whose sum is σ = 405580700448. Its totient is φ = 97486512480.

The previous prime is 213213431441. The next prime is 213213431447. The reversal of 213213431444 is 444134312312.

213213431444 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (213213431441) and next prime (213213431447).

It is a self number, because there is not a number n which added to its sum of digits gives 213213431444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213213431441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19154522 + ... + 19165649.

It is an arithmetic number, because the mean of its divisors is an integer number (16899195852).

Almost surely, 2^213213431444 is an apocalyptic number.

It is an amenable number.

213213431444 is a deficient number, since it is larger than the sum of its proper divisors (192367269004).

213213431444 is a wasteful number, since it uses less digits than its factorization.

213213431444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38320295 (or 38320293 counting only the distinct ones).

The product of its digits is 27648, while the sum is 32.

Adding to 213213431444 its reverse (444134312312), we get a palindrome (657347743756).

The spelling of 213213431444 in words is "two hundred thirteen billion, two hundred thirteen million, four hundred thirty-one thousand, four hundred forty-four".