181550041 has 2 divisors, whose sum is σ = 181550042. Its totient is φ = 181550040.

The previous prime is 181550029. The next prime is 181550081. The reversal of 181550041 is 140055181.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 117614025 + 63936016 = 10845^2 + 7996^2 .

It is a cyclic number.

It is not a de Polignac number, because 181550041 - 2¹⁷ = 181418969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 181549988 and 181550015.

It is not a weakly prime, because it can be changed into another prime (181550081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 90775020 + 90775021.

It is an arithmetic number, because the mean of its divisors is an integer number (90775021).

Almost surely, 2^181550041 is an apocalyptic number.

It is an amenable number.

181550041 is a deficient number, since it is larger than the sum of its proper divisors (1).

181550041 is an equidigital number, since it uses as much as digits as its factorization.

181550041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 800, while the sum is 25.

The square root of 181550041 is about 13474.0506530145. The cubic root of 181550041 is about 566.2377033100.

The spelling of 181550041 in words is "one hundred eighty-one million, five hundred fifty thousand, forty-one".