213243323412 has 96 divisors (see below), whose sum is σ = 595074816000. Its totient is φ = 58110509952.

The previous prime is 213243323393. The next prime is 213243323413. The reversal of 213243323412 is 214323342312.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 213243323412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213243323413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 516139 + ... + 832397.

It is an arithmetic number, because the mean of its divisors is an integer number (6198696000).

Almost surely, 2^213243323412 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213243323412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (297537408000).

213243323412 is an abundant number, since it is smaller than the sum of its proper divisors (381831492588).

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

213243323412 is a wasteful number, since it uses less digits than its factorization.

213243323412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316645 (or 316643 counting only the distinct ones).

The product of its digits is 20736, while the sum is 30.

Adding to 213243323412 its reverse (214323342312), we get a palindrome (427566665724).

The spelling of 213243323412 in words is "two hundred thirteen billion, two hundred forty-three million, three hundred twenty-three thousand, four hundred twelve".