213443243240 has 32 divisors (see below), whose sum is σ = 481607803080. Its totient is φ = 85135429632.

The previous prime is 213443243231. The next prime is 213443243243. The reversal of 213443243240 is 42342344312.

213443243240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 100371110596 + 113072132644 = 316814^2 + 336262^2 .

It is a junction number, because it is equal to n+sod(n) for n = 213443243197 and 213443243206.

It is not an unprimeable number, because it can be changed into a prime (213443243243) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7544069 + ... + 7572308.

Almost surely, 2^213443243240 is an apocalyptic number.

213443243240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213443243240 is an abundant number, since it is smaller than the sum of its proper divisors (268164559840).

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

213443243240 is a wasteful number, since it uses less digits than its factorization.

213443243240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15116741 (or 15116737 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 32.

Adding to 213443243240 its reverse (42342344312), we get a palindrome (255785587552).

The spelling of 213443243240 in words is "two hundred thirteen billion, four hundred forty-three million, two hundred forty-three thousand, two hundred forty".