213506541063355 has 4 divisors (see below), whose sum is σ = 256207849276032. Its totient is φ = 170805232850680.

The previous prime is 213506541063349. The next prime is 213506541063427. The reversal of 213506541063355 is 553360145605312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 213506541063355 - 2¹⁹ = 213506540539067 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213506541063299 and 213506541063308.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21350654106331 + ... + 21350654106340.

It is an arithmetic number, because the mean of its divisors is an integer number (64051962319008).

Almost surely, 2^{213506541063355} is an apocalyptic number.

213506541063355 is a deficient number, since it is larger than the sum of its proper divisors (42701308212677).

213506541063355 is an equidigital number, since it uses as much as digits as its factorization.

213506541063355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42701308212676.

The product of its (nonzero) digits is 4860000, while the sum is 49.

Adding to 213506541063355 its reverse (553360145605312), we get a palindrome (766866686668667).

The spelling of 213506541063355 in words is "two hundred thirteen trillion, five hundred six billion, five hundred forty-one million, sixty-three thousand, three hundred fifty-five".