213650232185 has 16 divisors (see below), whose sum is σ = 276124948176. Its totient is φ = 157759273728.

The previous prime is 213650232181. The next prime is 213650232227. The reversal of 213650232185 is 581232056312.

It can be written as a sum of positive squares in 8 ways, for example, as 11578405609 + 202071826576 = 107603^2 + 449524^2 .

It is a cyclic number.

It is not a de Polignac number, because 213650232185 - 2² = 213650232181 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213650232181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 682307 + ... + 944903.

It is an arithmetic number, because the mean of its divisors is an integer number (17257809261).

Almost surely, 2^213650232185 is an apocalyptic number.

It is an amenable number.

213650232185 is a deficient number, since it is larger than the sum of its proper divisors (62474715991).

213650232185 is a wasteful number, since it uses less digits than its factorization.

213650232185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275132.

The product of its (nonzero) digits is 86400, while the sum is 38.

Adding to 213650232185 its reverse (581232056312), we get a palindrome (794882288497).

The spelling of 213650232185 in words is "two hundred thirteen billion, six hundred fifty million, two hundred thirty-two thousand, one hundred eighty-five".