181543041 has 6 divisors (see below), whose sum is σ = 262228850. Its totient is φ = 121028688.

The previous prime is 181543013. The next prime is 181543049. The reversal of 181543041 is 140345181.

It is a happy number.

181543041 is a `hidden beast` number, since 1 + 81 + 543 + 0 + 41 = 666.

It can be written as a sum of positive squares in only one way, i.e., 171714816 + 9828225 = 13104^2 + 3135^2 .

It is not a de Polignac number, because 181543041 - 2⁵ = 181543009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181542996 and 181543014.

It is not an unprimeable number, because it can be changed into a prime (181543049) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10085716 + ... + 10085733.

Almost surely, 2^181543041 is an apocalyptic number.

It is an amenable number.

181543041 is a deficient number, since it is larger than the sum of its proper divisors (80685809).

181543041 is a wasteful number, since it uses less digits than its factorization.

181543041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20171455 (or 20171452 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 181543041 is about 13473.7908919502. The cubic root of 181543041 is about 566.2304257666.

The spelling of 181543041 in words is "one hundred eighty-one million, five hundred forty-three thousand, forty-one".