213243424040 has 32 divisors (see below), whose sum is σ = 485578406880. Its totient is φ = 84269689152.

The previous prime is 213243424039. The next prime is 213243424049. The reversal of 213243424040 is 40424342312.

It is a junction number, because it is equal to n+sod(n) for n = 213243423994 and 213243424012.

It is not an unprimeable number, because it can be changed into a prime (213243424049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32111654 + ... + 32118293.

It is an arithmetic number, because the mean of its divisors is an integer number (15174325215).

Almost surely, 2^213243424040 is an apocalyptic number.

213243424040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213243424040 is an abundant number, since it is smaller than the sum of its proper divisors (272334982840).

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

213243424040 is a wasteful number, since it uses less digits than its factorization.

213243424040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64230041 (or 64230037 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 29.

Adding to 213243424040 its reverse (40424342312), we get a palindrome (253667766352).

The spelling of 213243424040 in words is "two hundred thirteen billion, two hundred forty-three million, four hundred twenty-four thousand, forty".