213366225181 has 2 divisors, whose sum is σ = 213366225182. Its totient is φ = 213366225180.

The previous prime is 213366225161. The next prime is 213366225217. The reversal of 213366225181 is 181522663312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179747169156 + 33619056025 = 423966^2 + 183355^2 .

It is a cyclic number.

It is not a de Polignac number, because 213366225181 - 2³¹ = 211218741533 is a prime.

It is a super-2 number, since 2×213366225181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (213366225101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106683112590 + 106683112591.

It is an arithmetic number, because the mean of its divisors is an integer number (106683112591).

Almost surely, 2^213366225181 is an apocalyptic number.

It is an amenable number.

213366225181 is a deficient number, since it is larger than the sum of its proper divisors (1).

213366225181 is an equidigital number, since it uses as much as digits as its factorization.

213366225181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 40.

Adding to 213366225181 its reverse (181522663312), we get a palindrome (394888888493).

The spelling of 213366225181 in words is "two hundred thirteen billion, three hundred sixty-six million, two hundred twenty-five thousand, one hundred eighty-one".