213776022085 has 4 divisors (see below), whose sum is σ = 256531226508. Its totient is φ = 171020817664.

The previous prime is 213776022073. The next prime is 213776022113. The reversal of 213776022085 is 580220677312.

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 24235951041 + 189540071044 = 155679^2 + 435362^2 .

It is a cyclic number.

It is not a de Polignac number, because 213776022085 - 2¹¹ = 213776020037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21377602204 + ... + 21377602213.

It is an arithmetic number, because the mean of its divisors is an integer number (64132806627).

Almost surely, 2^213776022085 is an apocalyptic number.

It is an amenable number.

213776022085 is a deficient number, since it is larger than the sum of its proper divisors (42755204423).

213776022085 is an equidigital number, since it uses as much as digits as its factorization.

213776022085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42755204422.

The product of its (nonzero) digits is 282240, while the sum is 43.

Adding to 213776022085 its reverse (580220677312), we get a palindrome (793996699397).

The spelling of 213776022085 in words is "two hundred thirteen billion, seven hundred seventy-six million, twenty-two thousand, eighty-five".