213502544406 has 96 divisors (see below), whose sum is σ = 496774556928. Its totient is φ = 66096233280.

The previous prime is 213502544401. The next prime is 213502544407. The reversal of 213502544406 is 604445205312.

213502544406 is a `hidden beast` number, since 21 + 3 + 50 + 2 + 544 + 40 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213502544401) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7506945 + ... + 7535331.

It is an arithmetic number, because the mean of its divisors is an integer number (5174734968).

Almost surely, 2^213502544406 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213502544406, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248387278464).

213502544406 is an abundant number, since it is smaller than the sum of its proper divisors (283272012522).

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

213502544406 is a wasteful number, since it uses less digits than its factorization.

213502544406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28946 (or 28943 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

Adding to 213502544406 its reverse (604445205312), we get a palindrome (817947749718).

The spelling of 213502544406 in words is "two hundred thirteen billion, five hundred two million, five hundred forty-four thousand, four hundred six".