213343552521 has 24 divisors (see below), whose sum is σ = 344377182240. Its totient is φ = 126145483200.

The previous prime is 213343552519. The next prime is 213343552537. The reversal of 213343552521 is 125255343312.

213343552521 is a `hidden beast` number, since 2 + 13 + 3 + 43 + 552 + 52 + 1 = 666.

It is not a de Polignac number, because 213343552521 - 2¹ = 213343552519 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (213343552921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26276251 + ... + 26284368.

It is an arithmetic number, because the mean of its divisors is an integer number (14349049260).

Almost surely, 2^213343552521 is an apocalyptic number.

It is an amenable number.

213343552521 is a deficient number, since it is larger than the sum of its proper divisors (131033629719).

213343552521 is a wasteful number, since it uses less digits than its factorization.

213343552521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52560677 (or 52560674 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 213343552521 its reverse (125255343312), we get a palindrome (338598895833).

The spelling of 213343552521 in words is "two hundred thirteen billion, three hundred forty-three million, five hundred fifty-two thousand, five hundred twenty-one".