213123000444 has 24 divisors (see below), whose sum is σ = 500864609280. Its totient is φ = 70529913264.

The previous prime is 213123000439. The next prime is 213123000451. The reversal of 213123000444 is 444000321312.

It is a congruent number.

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, 63884124 + ... + 63887459.

It is an arithmetic number, because the mean of its divisors is an integer number (20869358720).

Almost surely, 2^213123000444 is an apocalyptic number.

It is an amenable number.

213123000444 is an abundant number, since it is smaller than the sum of its proper divisors (287741608836).

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

213123000444 is a wasteful number, since it uses less digits than its factorization.

213123000444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127771729 (or 127771727 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 213123000444 its reverse (444000321312), we get a palindrome (657123321756).

The spelling of 213123000444 in words is "two hundred thirteen billion, one hundred twenty-three million, four hundred forty-four", and thus it is an aban number.