113442181 has 2 divisors, whose sum is σ = 113442182. Its totient is φ = 113442180.

The previous prime is 113442163. The next prime is 113442221. The reversal of 113442181 is 181244311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80838081 + 32604100 = 8991^2 + 5710^2 .

It is an emirp because it is prime and its reverse (181244311) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 113442181 - 2⁷ = 113442053 is a prime.

It is a super-2 number, since 2×113442181² = 25738256860073522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (113442151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56721090 + 56721091.

It is an arithmetic number, because the mean of its divisors is an integer number (56721091).

Almost surely, 2^113442181 is an apocalyptic number.

It is an amenable number.

113442181 is a deficient number, since it is larger than the sum of its proper divisors (1).

113442181 is an equidigital number, since it uses as much as digits as its factorization.

113442181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 768, while the sum is 25.

The square root of 113442181 is about 10650.9239505312. The cubic root of 113442181 is about 484.0886005069.

Adding to 113442181 its reverse (181244311), we get a palindrome (294686492).

The spelling of 113442181 in words is "one hundred thirteen million, four hundred forty-two thousand, one hundred eighty-one".