213543124256 has 144 divisors (see below), whose sum is σ = 543579724800. Its totient is φ = 81628485120.

The previous prime is 213543124247. The next prime is 213543124297. The reversal of 213543124256 is 652421345312.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 797345 + ... + 1030943.

It is an arithmetic number, because the mean of its divisors is an integer number (3774859200).

Almost surely, 2^213543124256 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 213543124256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271789862400).

213543124256 is an abundant number, since it is smaller than the sum of its proper divisors (330036600544).

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

213543124256 is a wasteful number, since it uses less digits than its factorization.

213543124256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233687 (or 233672 counting only the distinct ones).

The product of its digits is 172800, while the sum is 38.

Adding to 213543124256 its reverse (652421345312), we get a palindrome (865964469568).

The spelling of 213543124256 in words is "two hundred thirteen billion, five hundred forty-three million, one hundred twenty-four thousand, two hundred fifty-six".