181340243 has 8 divisors (see below), whose sum is σ = 207328512. Its totient is φ = 155372616.

The previous prime is 181340231. The next prime is 181340317. The reversal of 181340243 is 342043181.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181340243 - 2⁴ = 181340227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (181340213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27296 + ... + 33282.

It is an arithmetic number, because the mean of its divisors is an integer number (25916064).

Almost surely, 2^181340243 is an apocalyptic number.

181340243 is a deficient number, since it is larger than the sum of its proper divisors (25988269).

181340243 is an equidigital number, since it uses as much as digits as its factorization.

181340243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10321.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 181340243 is about 13466.2631416440. The cubic root of 181340243 is about 566.0195057519.

The spelling of 181340243 in words is "one hundred eighty-one million, three hundred forty thousand, two hundred forty-three".