213521443536 has 20 divisors (see below), whose sum is σ = 551597062592. Its totient is φ = 71173814496.

The previous prime is 213521443517. The next prime is 213521443537. The reversal of 213521443536 is 635344125312.

It is a junction number, because it is equal to n+sod(n) for n = 213521443494 and 213521443503.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213521443537) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224181656 + ... + 2224181751.

Almost surely, 2^213521443536 is an apocalyptic number.

It is an amenable number.

213521443536 is an abundant number, since it is smaller than the sum of its proper divisors (338075619056).

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

213521443536 is a wasteful number, since it uses less digits than its factorization.

213521443536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4448363418 (or 4448363412 counting only the distinct ones).

The product of its digits is 259200, while the sum is 39.

Adding to 213521443536 its reverse (635344125312), we get a palindrome (848865568848).

The spelling of 213521443536 in words is "two hundred thirteen billion, five hundred twenty-one million, four hundred forty-three thousand, five hundred thirty-six".