213052203505 has 4 divisors (see below), whose sum is σ = 255662644212. Its totient is φ = 170441762800.

The previous prime is 213052203467. The next prime is 213052203517. The reversal of 213052203505 is 505302250312.

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

It can be written as a sum of positive squares in 2 ways, for example, as 130656223296 + 82395980209 = 361464^2 + 287047^2 .

It is not a de Polignac number, because 213052203505 - 2¹³ = 213052195313 is a prime.

It is a Duffinian number.

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, 21305220346 + ... + 21305220355.

It is an arithmetic number, because the mean of its divisors is an integer number (63915661053).

Almost surely, 2^213052203505 is an apocalyptic number.

It is an amenable number.

213052203505 is a deficient number, since it is larger than the sum of its proper divisors (42610440707).

213052203505 is an equidigital number, since it uses as much as digits as its factorization.

213052203505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42610440706.

The product of its (nonzero) digits is 9000, while the sum is 28.

Adding to 213052203505 its reverse (505302250312), we get a palindrome (718354453817).

The spelling of 213052203505 in words is "two hundred thirteen billion, fifty-two million, two hundred three thousand, five hundred five".