213243311420 has 48 divisors (see below), whose sum is σ = 471473200800. Its totient is φ = 80792006400.

The previous prime is 213243311419. The next prime is 213243311441. The reversal of 213243311420 is 24113342312.

213243311420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 213243311420.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1964570 + ... + 2070270.

It is an arithmetic number, because the mean of its divisors is an integer number (9822358350).

Almost surely, 2^213243311420 is an apocalyptic number.

213243311420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213243311420 is an abundant number, since it is smaller than the sum of its proper divisors (258229889380).

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

213243311420 is a wasteful number, since it uses less digits than its factorization.

213243311420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111038 (or 111036 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 213243311420 its reverse (24113342312), we get a palindrome (237356653732).

The spelling of 213243311420 in words is "two hundred thirteen billion, two hundred forty-three million, three hundred eleven thousand, four hundred twenty".