115042181 has 4 divisors (see below), whose sum is σ = 115288992. Its totient is φ = 114795372.

The previous prime is 115042163. The next prime is 115042189. The reversal of 115042181 is 181240511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 181240511 = 5113 ⋅35447.

It is a cyclic number.

It is not a de Polignac number, because 115042181 - 2¹⁸ = 114780037 is a prime.

It is a super-2 number, since 2×115042181² = 26469406818473522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115042189) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 122705 + ... + 123638.

It is an arithmetic number, because the mean of its divisors is an integer number (28822248).

Almost surely, 2^115042181 is an apocalyptic number.

It is an amenable number.

115042181 is a deficient number, since it is larger than the sum of its proper divisors (246811).

115042181 is an equidigital number, since it uses as much as digits as its factorization.

115042181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246810.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 115042181 is about 10725.7718137204. The cubic root of 115042181 is about 486.3538620289.

Adding to 115042181 its reverse (181240511), we get a palindrome (296282692).

The spelling of 115042181 in words is "one hundred fifteen million, forty-two thousand, one hundred eighty-one".