181982241 has 16 divisors (see below), whose sum is σ = 308118400. Its totient is φ = 103989744.

The previous prime is 181982239. The next prime is 181982249. The reversal of 181982241 is 142289181.

It is a happy number.

It is not a de Polignac number, because 181982241 - 2¹ = 181982239 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181982196 and 181982205.

It is not an unprimeable number, because it can be changed into a prime (181982249) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 481246 + ... + 481623.

It is an arithmetic number, because the mean of its divisors is an integer number (19257400).

Almost surely, 2^181982241 is an apocalyptic number.

It is an amenable number.

181982241 is a deficient number, since it is larger than the sum of its proper divisors (126136159).

181982241 is an equidigital number, since it uses as much as digits as its factorization.

181982241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 962885 (or 962879 counting only the distinct ones).

The product of its digits is 9216, while the sum is 36.

The square root of 181982241 is about 13490.0793548444. The cubic root of 181982241 is about 566.6866777631.

The spelling of 181982241 in words is "one hundred eighty-one million, nine hundred eighty-two thousand, two hundred forty-one".